How To Measure An Interior Door For Replacement

How to measure a door the right way, the first time

The act of measuring the size of a door appears to be very straightforward, doesn’t it? To determine the size of your old door, just take a tape measure and measure its height and breadth. Both yes and no. Actually, there is a little more to measuring doors than just taking the height and width of the door. Your door replacement measurements will differ depending on whether you are replacing only the door or whether you are also replacing the frame and hinges. Follow these steps to learn how to measure a door:

Interior Door Slab

It is possible to replace only the door itself (also known as a door slab) if your frame and hinges are in good shape and you choose to retain them intact. To take measurements for an interior door replacement, follow these steps:

  1. Measure horizontally across the door in three different places: the top, center, and bottom of the door. The width of the door should be measured from the smallest measurement. Vertical height of the door should be measured from three different points: the left side, the middle, and the right side. Make a note of the shortest measurement, which will serve as the door height. Take the thickness of the door into consideration. Inside doors are typically 1 3/4″ thick (a standard thickness for an internal door).
  2. Take note of the locations of all three hinges. To acquire these dimensions, take a horizontal measurement from the top of the door to the top of each hinge. The width and height of each hinge need to be measured. To find out how much space you have between the top of the door and the center of the bore (hole for the handle). Preventing the door handle and deadbolt from being installed before measuring will provide the most accurate measurement. To find out the distance between the center of the bore (doorknob hole) and the nearest door edge, use the following formula:

Pre-hung System/Net Frame

Even if the door frame is in good condition, if you wish to change it for aesthetic reasons, you will want to take measurements of the approximate opening dimensions before you begin. To prepare for taking measurements, first lightly remove the trim from around the aperture using a pry bar and putty knife. Remove any insulation that may have accumulated between the edge of the rough aperture and the door slab using the putty knife. This will make it possible to take more exact measurements.

  1. Just like you would with a standard door slab measurement, take a horizontal measurement across the whole door slab itself. Measure three different locations: the top, the center, and the bottom. The width of the door slab should be measured from the smallest measurement. To measure the vertical height of the door slab itself, perform the same thing as you would for a normal door slab measurement. Measure in three different locations: the left side, the middle, and the right side. Make a note of the shortest measurement, which will serve as the door height. Take three horizontal measurements of the rough opening in a straight line (top, middle, and bottom). Using the smallest measurement, estimate the approximate aperture width. Take three vertical measurements of the rough opening to be used later (left side, center, right side). Make a note of the shortest measurement, which will serve as the approximate entrance height. The thickness of the door jamb should be measured. This dimension is referred to as the jamb width.

Once you’ve taken these measurements, you’ll have all the information you need to choose the appropriate size doors for your home. Please contact us with your measurements, and we would be happy to offer you with a price on one of our many popular door types. Contact us now!

How To Measure Up For a New Door Size

JB Please keep in mind that locating the correct door size for your needs may be a time-consuming process. We understand that searching for the perfect door just to wind up with an ill-fitting door size is not something anybody wants to experience, so please be understanding. If you follow our instructions on how to measure up for a new door size, you will avoid purchasing a product that is not suitable for your needs. If you are purchasing replacement doors, please keep in mind that you do not need to measure the current door.

Please keep in mind the old craftsman’s adage “measure twice, cut once,” which means “measure twice, cut once.” An additional consideration when taking door dimensions is the direction in which the door swings open.

Hinge positions on the left and right sides indicate which way the door is opened, while position on the left and right sides indicates which way the door is opened.

The width of the door is determined by the measurement that is the broadest.

  • Make use of a tape measure to determine the width of each of the three regions of the doorframe. Measure the width of the frame from the left to the right with a tape measure and make note of the figures
  • Doors are often available in the following widths in the United Kingdom: 24 inches/610 mm, 27 inches/686 mm, 30 inches/762 mm, and 33 inches/838 mm.

Step 2: Measure the door height:

The interior of each vertical side of the frame should be measured.

The needed height is determined by the length that is the longest. Keep in mind to account for any floor covering you may have.

  • Measure the height of the door frame with a tape measure to ensure that it is correct. Each side should be measured from the top corner to the bottom corner using the tape, and the longest length should be recorded as the number one. Always keep in mind that you may need to stand on something, such as a chair, in order to reach the top of the frame, so enlisting the assistance of a family member or friend may be a good option. The normal door height in the United Kingdom is most usually 6’6″/1981mm, however some doors may be as high as 2040mm.

Step 3: Measure the door thickness:

Make sure to take this measurement as well if you want to acquire replacement doors and maintain your existing frames. If you want to reproduce the thickness of your existing doors while keeping your existing frames, you will need to replicate the thickness of your existing doors.

  • Measure the thickness of the current door with a tape measure to determine its size. Run the tape measure around the edge of the door and note the thickness measurement
  • You should also measure the rebate in the frame, which is where the door rests when it is closed. The recording of both dimensions should be a tight match and fit with one of the standard door thicknesses in the United Kingdom, which are as follows: The most typical thickness is 35 mm, however some doors may be as thick as 40 mm. NB: The term “fire door” refers to a door with a 45mm thickness.

For a more in-depth look at the most common door sizes, check out our explanation of UK standard door dimensions. If you want a door size that is not normal, please contact us as some of our door ranges may be produced to order in non-standard sizes.

Measuring for a Replacement Door

The procedure of measuring an old door or door opening for a replacement door is straightforward. Knowing how to properly use a tape measure will allow you to measure a door effectively. Choosing where to take measures is the only difficult part: should you measure the door itself, the door frame, or the entire opening? This will become evident once you have a basic understanding of door structure and have determined how much of the door you will be replacing. In order to function effectively, doors must be installed plumb and level on the wall.

Prehung Door Unit vs. Door Slab

In the door business, a prehung door is a whole door unit that consists of a door that has already been hung with hinges and a jamb frame that is complete. In most cases, interior prehung doors contain side and top jambs, but they do not include a door sill or threshold, nor any ornamental trim. Many external prehung doors come with outside trim, which is often a conventional thick wood molding known as brick mold. Exterior prehung doors feature a four-sided frame with a threshold, and many of them contain exterior trim.

Prehung door installation on an outside wall.

This is referred to as a door slab.

It is the same technique to measure for both interior and exterior doors, with the exception of prehung exterior doors with trim, which require an additional measurement to ensure the trim will fit the opening for the external siding.

Door Anatomy

First, a brief introduction to the building of doors. Therough opening is the term used to describe the structural aperture in a wall that is used for a door. Essentially, this is the opening made by the wall studs on either side, together with the header at the top and the floor or sill at the bottom. A door frame, sometimes known as a jamb frame, is the wood frame from which a door hangs. It is composed of side jambs, a top (or head) jamb, and, in the case of external doors, a threshold, among other components.

Exterior doors are typically equipped with jambs that include a built-in step that functions as a stop.

This allows you enough space to put the frame into the aperture and square it up before connecting it to the framework of the rough opening with screws or nails.

Shims are inserted into these gaps at the points where the nails or screws are hammered, and they assist to maintain the frame plumb and level.

This trim, which is known as casing, must be removed in order to measure for a prehung door, but it can be left in place if you are only changing the door slab and nothing else.

How to Measure for a Prehung Door

Because a prehung door unit is already equipped with a door that is designed to suit its frame, all of your measurements will be taken in relation to the frame rather than to the door slab. If you’re replacing an existing door unit, you should consider the following:

  1. Using a flat pry bar, remove the casing (trim) on one side of the door (the inner side for external doors)
  2. To determine the width of the door frame, measure the distance between the outside of one jamb and the outside of another jamb on the opposite side of the door frame. Measure at three different locations: The top, center, and bottom of the frame should all have the smallest possible measurements. Measure the height of the door frame from the bottom of the threshold (for an exterior door) or the surface of the floor (for an interior door) to the top edge of the top jamb on the outside (outside edge). Repeat the process by measuring in three locations and using the least measurement
  3. Measure the width of the side jamb from the inside edge to the external edge, excluding the exterior trim. Note: This measurement does not include the exterior trim. The width of the jambs should be equal to the whole thickness of the wall, excluding any trim or siding, if applicable. The width and height of the trim frame on the outer side of the door should be measured as well. The size of the opening in the siding will be determined by the size of the door unit after it is removed. The new door should have a brick mold that matches these measurements, or you should plan to build new trim that will bridge the gap between the door jambs and the siding to make up for the difference. Before ordering a new door, double-check the swing of the existing door (see below).

If you’re installing a prehung door in a rough opening, you’ll need to accomplish the following:

  1. Using the inner faces of the side studs as your guide, measure the width of the rough aperture. Take measurements at the top, center, and bottom of the aperture, and use the smallest measurement possible
  2. To determine the height of the rough opening, start at the floor or rough sill and work your way down to the bottom face of the header. Measure three times and use the smallest of the three measurements
  3. The thickness of the wall should be determined by measuring from the exposed faces of the drywall or sheathing on both sides of the wall
  4. Before ordering a new door, double-check the swing of the existing door (see below). Place an order with the manufacturer for the door unit using the measurements you took. Shim gaps will be accommodated by subtracting the necessary amount from the width and height measurements supplied by the manufacturer.

The preliminary opening measurements for the door will be used to place an order for a replacement prehung door.

How to Measure for a Door Slab

Door slabs are simple to measure since you are just taking the measurements of the old door while it is still in place. Note that the width of the door should be measured from the rear, which is the side that opens in, because this side is somewhat broader than the front side. In order to avoid the door scraping against the jamb as it closes, the edge of the door on the latch side has been gently beveled.

  1. To begin, close the door and place your feet on the rear of the door, where the hinges can be seen
  2. Take measurements of the door’s width and height
  3. Open the door and take a measurement of the thickness of the door
  4. Before ordering a new door, double-check the swing of the existing door (see below).

Instead, if the old door does not fit its frame properly, or if the old door is not present, measure the jamb frame, which should be as follows:

  1. Measure the width of the interior of the frame at the top, middle, and bottom, and pick the smallest measurement available. Make certain that you are measuring to the jambs and not the stops. To find out how tall your door frame is, measure it from the top of the floor (for an internal door) or the threshold (for an exterior door), all the way to the inner (bottom) face of the top jamb. Measure three times and use the smallest of the three measurements
  2. If you want to know how thick your door should be, take a measurement of how much space there is between the stops and the rear of the jambs
  3. This is the depth of the pocket the door will fit into when it is closed. Use the measured dimension (a door that is about 1/16 inch narrower than the stated dimension is acceptable as well)
See also:  How Much To Paint 1400 Sq Ft House Interior

Which Way Does Your Door Swing?

Doors can be opened from either the left or the right. This is referred to as the door swing. In order to figure out which direction your door swings, open it all the way and stand with your back against the hinge-side jamb. The term “left-handdoor” refers to the door that is on your left side. If the door is located on your right side, it is referred to as a right-hand door.

How to Measure to Replace an Interior Prehung Door

Prehung interior doors are popular among builders and homeowners because they are easy to install and come with all of the hardware necessary. The manufacturer, Rustica, adds that prehung interior doors have already been built and are sold with their respective door frames. If you are ready to replace a prehung door and frame that is currently in your home, you will need to begin by taking some measurements for the endeavor.

Door Removal and Measuring

Measure for a prehung internal door according to the instructions on the WCMA NET WindowDoor page. Before you can begin, you must first delete the previous one from the system. For this initial stage, you’ll need a utility knife, a pry bar, a level, and a shim, among other tools and materials. Using the utility knife and pry bar, pry the door frame out of the way. You will be able to see the door studs, also known as beams, at the rear of the molding. If the stud is out of plumb by more than 1/4 inch, make careful you level it out using a level.

For the height, take a measurement from the top of the frame all the way down to the floor surface, near to the right end of the frame.

If the two measures are different, the smaller one should be used to determine your height.

Remaining Door Measurements

For the width, take a measurement from the top of the door frame to the bottom of the door frame and write down the number. Repeat this process twice more, this time in the middle and at the bottom of the door frame. The smallest measurement is the one that will be used in your calculations. You will also need to take the thickness of the door into consideration. Generally speaking, the usual thickness for interior doors is 1 3/8 inches, however you may come across ones that are 1 1/2 inches or 1 3/4 inches in thickness.

Before placing an order for a new internal prehung door, you will need to take note of the thickness of the inner door jamb.

Interior jambs on prehung doors are typically 4 9/16 inches wide, while some doors have jambs that are 6 9/16 inches wide. Take into consideration how the door opens as well, such as whether it swings left or right and if it opens inward or outward.

Door Size Guides

For further assistance with measuring, Remodeling Expenseprovides online tools, such as door measurement calculators, which you can use to compare your door rough-in with other doors in your house. The typical size of a door is 6 feet by 8 feet, with the most common width being 2 feet and 6 inches in width. This information is included in the typical door size chart from Remodeling Expense for prehung doors, as well as bifold and pocket doors, among other things. When it comes to measuring for prehung doors, Bob Vila provides some helpful information, as well as some shopping suggestions that might be handy when you are out shopping.

In addition, the minimum width necessary for most passage doors is 32 inches in height and breadth.

For those considering making that investment, it may be wise to have a professional come to your home and take precise measurements before placing your order for the door.

Things You Will Need

  • Utility knife, pry bar, level, shim, tape measure, pencil or pen, and paper are all required.

4 Steps to Measure a Door for Replacement

Is it time to update the look of your foyer with a new door or set of draperies? The first step is to ensure that the measurements are accurate, and the good news is that you do not need to be a professional to do so. It is beneficial to have a rudimentary understanding of the anatomy of a door in order to know where to measure. When comparing measurements taken from the door frame to those taken from the rough aperture or the door slab, you will notice a substantial discrepancy in the dimensions obtained.

Tools for door measurements

Here is a list of the materials you will require to accomplish this project:

  • The following items are required: tape measure, notebook and pen, step ladder or chair.

The basic anatomy of a door

It is recommended that you become acquainted with the jargon of the door industry before beginning to measure. If you’re wanting to replace your door, you have the option of installing a door slab or a prehung door, depending on your needs. A prehung door is one that is supplied with hinges and is fastened to the jamb frame before installation. Exterior prehung doors are often equipped with a door sill, frame, and trim, whilst interior prehung doors are typically devoid of a sill or trim. A door slab is simply a solid piece of door that does not include any ornamental trims or accessories such as ashings, jambs, or other decorative elements.

Beyond this little distinction, the procedure of measuring prehung doors for both the exterior and the inside is essentially the same.

Step-by-step guide on how to measure door size

Because it does not have any other features, a door slab is less difficult to measure. To get started, simply follow these steps:

Step 1. Take the width measurements

Position yourself behind the closed door with your tape measure in hand. Placing the tape measure on the door itself, measure from the top left corner to the top right corner, and making a note of these measurements It is also a good idea to measure the center and bottom portions of the door as well.

If you receive conflicting measurements, use the largest value and use it as the width of the door.

Step 2. Measure the height

Place the tape measure at the top corner of the door and run it down to the bottom corner of the door to calculate the height of the door while the door is still closed. Take note of the following illustration. Keep in mind that you should measure the slab itself, not the frame or sill. In order to achieve an accurate height measurement, take measurements in several regions of the door and utilize the longest dimension.

Step 3. Determine the thickness of the door

Open the door and set the tape measure on the edge of the door, widthwise, to determine the thickness of the door. Additionally, you may measure the distance between the jamb’s backside and the stops to figure out the door’s overall thickness. Both approaches should provide you with measurements that are more or less the same as one another. Make a note of this measurement.

Step 4. Determine the dimensions of the door frame

In addition to taking measures for the door itself, it is a good idea to take measurements for the frame as well, just to be on the safe side. This will assist you in selecting a new door that is the best match for your home. To obtain dimensions for the door frame, simply follow these three easy steps:

  • Place the tape measure on the inner side of the door frame on one side and measure all the way around to the opposite side of the door frame. In more than one point, take measurements and use the least measurement as the width dimensions
  • Measure the distance between the floor (for internal doors) or the threshold (for exterior doors) and the bottom portion of the upper trim of the door. Running a tape measure around the center, left, and right sides of the aperture will provide the most precise height measurement. From the outside region of the side frame to the inner area of the side frame, measure the thickness. Again, take three measurements in separate locations and use the biggest of the three measurements to determine the thickness of the frame
  • It is possible that the door will not fit into the frame, particularly in older homes. In this scenario, you will obtain the most exact measurements by measuring the jamb itself for the dimensions of width, height, and thickness
  • Always take measures from behind the door in order to get precise measurements. This is due to the fact that the rear of a door is often broader than the front side
  • It is preferable to err on the side of a somewhat bigger door rather than a smaller one. Prior to purchasing a new door, be sure to inspect the swing, or the direction in which the door opens.

How to measure for a prehung door

It makes a difference whether you are installing a prehung door in an aperture that has never had a door before or whether you are replacing an existing door in how you measure for a prehung door. In the event that you are building a door in an aperture that has never previously had a door, the following is how to measure for one:

Step 1. Measure the width

Take a tape measure and place it on the inner stud on one side of the stud and follow it along to the stud on the other side. Measure at more than one position, such as the top, middle, and bottom sections of the rough aperture, and use the smallest figure to determine the width of the rough opening.

Step 2. Determine the height

Measure the height of the rough opening from the sill to the lower section of the header, starting at the sill and working your way up. Remember to take three separate measurements and to use the smallest of the three figures as the height.

Step 3. Find out the thickness

When measuring the thickness of a prehung door, you will be measuring the thickness of the wall itself, not the thickness of the door frame or door slab, because there is none to speak of. Place the tape measure against the wall of the rough aperture and make a note of the measurements. If you are replacing an old door with a prehung door, follow these procedures to ensure that the correct dimensions are achieved:

Step 4. Get rid of the trim

Remove the trim by prying it out with a pry bar with a flat tip. This guarantees that you are just measuring from the door frame and not from the wall.

Step 5. Figure out the width

Place the tape measure from the outside jamb on one side to the outer jamb on the other side, starting at the outer jamb on one side. As is customary, take measurements at the top, middle, and bottom of the garment and use the smallest measurement as the width.

Step 6. Take the height measurements

Measure the distance between the sill and the top jamb with a tape measure.

If you are measuring an interior door, begin from the floor and work your way up; if you are measuring an exterior door, begin at the door sill. Once again, take three measurements in separate spots and choose the shortest value for the height.

Step 7. Determine the thickness

Start measuring from the inside edge of the side jamb to the outside edge of the side jamb using the tape measure. When measuring for thickness, make sure not to include the exterior trim in order to get precise measurements.

Extended tips

  • If you’re replacing your door, make a note of how far it swings open. This may appear to be a little detail, but it is critical for the proper installation of the new door to be completed. Depending on its orientation, your door may swing to the left or right, and it may swing inward or outward as well. It is simple to determine the swing of a door: Open the door with your back to the hinges and close it behind you. If the door is on your right, the swing is right-handed
  • If the door is flanked on your left, the swing is left-handed. Place yourself on the front side of the door and swing it open. Opened by pushing it toward the room, the door will swing inward, but opened by drawing it toward your body, the door will swing outward. When measuring, allow for some extra space. In response to changes in weather, the door and its surrounding frame might contract or expand, resulting in slightly varied measures at any given moment. Because of the expansion of wood caused by hot weather, your door may graze against the frame. The door, on the other hand, may contract, making it more difficult to latch and unlock. To account for these variations, add a little margin of roughly 2-4mm to each measurement you take. When measuring your door, whether for replacement or new installation, remember to take into consideration ornamental sidelights as well as the door itself. Take these measurements from the outside of your home for the most accurate results. To measure the width and height of the sidelight, lay the tape measure flat against it in a horizontal position first, then vertically.

An easy job requiring minimal DIY skills

The task of measuring a door for repair or new installation, or even for the purpose of curtain installation, may be completed in as little as a few minutes with the right tools. That being said, the point at which you begin measuring can make a huge difference in the results. Obtain dimensions for both the door slab and the door frame just to be on the safe side. For your convenience, here is a simple rundown on how to measure a door:

  • For the door slab, take three measurements of the width and height of the door itself and use the largest of the three measurements as the final dimension. Measure the thickness of the door’s edge horizontally to obtain the width and height measurements. Starting with the frame itself, rather than simply the door slab, should be used when measuring for a prehung door. Measure from one end of a rough opening to the other end of a rough opening, and from the floor (for an internal door) or threshold (for an exterior door) to the underside of the top trim where there is no rough opening.

Any questions or suggestions regarding how to measure a door would be much appreciated. Please share your thoughts with us in the comments section below.

See also:  How To Repaint Interior Doors

How to Measure the Size of a Door

Article in PDF format Article in PDF format It is as simple as taking a few measurements and performing some basic math to figure out the size of your front door. All that is required is the use of a measuring instrument to determine the height and breadth of the door. Once you have taken correct measurements, you can begin working on any home improvement project you have in mind, whether it is replacing a door, installing a new type door, or simply decorating the one you presently have.

  1. 1 Take a measurement of the width of the door. Run a tape measure along the length of your door from the left corner to the right corner and make a note of the measurement. It is critical that you just take measurements for the door. Make sure to leave out any extraneous components, such as weather-stripping.
  • It is especially crucial to measure in more than one position when dealing with older doors, just in case the door is not completely rectangular in the first place. The greatest value should be used if the quantities differ. For example, door widths of 30 inches (76 cm), 32 inches (81 cm), and 36 inches (91 cm) are considered standard.
  • 2 Measure the width of the door and the height of the door. Measure the length of your door from the top corner to the bottom corner with a tape measure and write down the result on a piece of paper. It is possible that you will need to utilize a chair and/or enlist the assistance of a buddy. Once again, just the door itself should be measured, not any extra components such as a door sweep.
  • Once again, it’s a good idea to take measurements in more than one location on the door in case it’s not a perfectly rectangular shape. This is especially true for doors that are over a decade old. Even if the amounts are different, choose the greatest value possible. For example, the most typical door height is 80 inches (200 cm).
  • Advertisement
  • s3 Decide on the door’s thickness by using the table below. Measure the thickness of the door’s edge with a tape measure and make a note of it. This edge on the door frame (also known as the jamb) should be measured as well. Although these values should be quite near to one another, it might be beneficial to be aware of both of them.
  • The most often encountered thickness is 1.75 inches (4.4 cm).
  • 4 Take the height and breadth of the framed door area into consideration. To be on the safe side, you should also measure the space where your door will be installed. Make a note of the height and breadth of the gap between the door frame and the wall. This will assist you in ensuring that you purchase the most appropriate replacement door.
  • Measure the width of the door at three different points. As a rule of thumb, choose the smallest figure possible. Take the height of the door in the middle, directly in the centre of the opening. Measure from the floor to the underside of the trim at the top of the door
  • If necessary, round down rather than round up the measurements. This will assist you in ensuring that your door will fit.
  1. 1 Take a photo of your front door and print it out for reference. When you walk into the store to choose a new door, you should carry a diagram with all of the important qualities and dimensions with you to the store. One simple method for accomplishing this is to photograph your door and then print off the image
  • Alternatively, you may just create a diagram on paper using a pen
  • 2 Make a note of the direction in which your door swings. Please open your door. Your body should be positioned such that your back is against the hinges. If the door is on the right side of the room, it is a right-handed room. If the door is on the left side of the room, it is left-handed. In addition, your door will be either in-swing or out-swing. Determine both of these features and make a note of them on the diagram that you created
  • A sliding door that swings into your home (or into a room) is called an in-swing door, while a sliding door that opens outward is called an out-swing door.
  1. 3Draw a graphic of your measurements and label each one. On your diagram, note the dimensions of your door, including its height, breadth, and thickness. Make a note of the door frame’s height, breadth, and thickness, as well. You should bring this diagram along with you while you are shopping for doors. If you follow the instructions in this illustration, the procedure of changing your door should be much simpler. Bring it with you whenever you are looking at doors and use it to influence your decision on which one to buy. Advertisement

Create a new question

  • QuestionHow do I go about measuring for a new door? Ryaan Tuttle is the founder and CEO of Best Handyman Boston, a company that specializes in home improvement. Ryaan has over 15 years of expertise in the home renovation and property care industry, and he specializes in integrating technology and craftsmanship to achieve superior results. Ryaan is a licensed construction supervisor as well as a licensed home improvement contractor. Best Handyman Boston, in contrast to the majority of handyman contractors, is licensed and insured. Best Handyman Boston has been recognized the “Best Handyman in Boston” by Boston Magazine and LocalBest.com, among other publications. Question answered by a Home Improvement Specialist
  • Expert In order to install a new door and a new door frame, I need to know how to measure. Ryaan Tuttle is the founder and CEO of Best Handyman Boston, a company that specializes in home improvement. Ryaan has over 15 years of expertise in the home renovation and property care industry, and he specializes in integrating technology and craftsmanship to achieve superior results. Ryaan is a licensed construction supervisor as well as a licensed home improvement contractor. Best Handyman Boston, in contrast to the majority of handyman contractors, is licensed and insured. Best Handyman Boston has been recognized the “Best Handyman in Boston” by Boston Magazine and LocalBest.com, among other publications. Expert Answer from a Home Improvement Specialist

Inquire about something There are 200 characters remaining. Include your email address so that you may be notified when this question has been resolved. SubmitAdvertisement

About This Article

Summary of the ArticleXTo determine the size of a door, first determine its width by measuring from the left corner of the door to the right corner of the door. Then, using a tape measure, measure the height of your door by running it from the top corner to the bottom corner. Using a tape measure, measure the thickness of your door by placing it against the inside edge of the door jam and marking it with a 0 or a 1. In the event that the door is not a perfect rectangle, take these measurements from a few different locations on the door to double-check your results.

For instructions on how to draw a schematic of your door, continue reading!

The writers of this page have together authored a page that has been read 181,068 times.

Did this article help you?

When it comes to changing your interior doors, there are several things to consider. It is important to accurately measure the door so that the new door will fit properly. If a door is broken or just out of style and does not complement the current décor in the home, it may be essential to replace it. If you are planning to replace your current door or to replace an existing door, the following recommendations will assist you in making the procedure more straightforward and less stressful. The first and most crucial point to remember is to select the most appropriate door.

  • There are a variety of colors, styles, and designs to select from.
  • An incorrectly sized door will not fit perfectly and will stick or jam, resulting in the door not closing completely tight.
  • To take accurate measurements, you’ll need a few simple tools.
  • When it comes to measuring for a door replacement, the process is quite straightforward.
  • In this situation, you will need to take measurements of the door in order to obtain the proper measures.
  • Always double-check your measurements to ensure that they are accurate.
  • There are just a few instances in which you will need to trim the new door in order for it to fit precisely.
  • When doing so, be sure to add two inches to both the door height and door width specifications to account for the extra space.
  • It can be a good idea to create a rough drawing of the room’s wall so that the location and size of the door can be precisely planned.
  • To ensure that the door hinges are installed correctly, start at the top of the door and measure carefully.

It is important to double-check the corners of the door and frame before hanging the door to ensure that they are tight and square. This part of the procedure will be made easier with the use of a frame square.

How to Measure for Replacement Doors

It’s simple to replace doors now. It is critical that you understand how to measure for replacement doors, whether you are replacing an old door, installing a larger door, or creating a whole new doorway. You will need to measure door measurements differently depending on where the door will be installed and how it will be used. In order to make changing doors as easy as possible, it is critical that you take note of all of this key information.

In This Guide:

Understanding the Replacement of Doors Door Dimensions That Are Typically Used Instructions on how to measure for replacement doors Making a decision on the proper door may be difficult, especially when there are so many various types of doors, including interior and exterior doors, all of which are available in a variety of shapes and sizes. If you want to know what you’re searching for and be able to get the proper replacement door, you must grasp how to measure for replacement doors. The last thing you want to do is make a purchase and then find yourself with a door that doesn’t fit properly.

Terminology

Before you can learn how to measure for replacement doors, you must first get familiar with some of the key language and vocabulary that is used throughout the process of installing them. Rough Opening: This is the structural opening within a wall that is generated by the head at the top, the wall studs on each side, and the floor or sill at the bottom of the wall. Door Jamb: The door jamb is the horizontal surface that extends vertically along each side of the frame on either side of the door.

  1. Frame/Jamb: The term refers to the wooden framework from which the door itself hangs and swings open.
  2. Interior door frames are frequently equipped with narrow strips known as stops, which are hammered into the frame to provide the edge against which the door closes.
  3. Prehung Door: A prehung door is one that has already been installed in the jamb frame and is equipped with hinges.
  4. Interior doors, on the other hand, are often devoid of a sill or frame.
  5. If you are conducting a complete renovation and installing a new door and frame, a prehung door is a smart choice to consider.
  6. In this case, you may replace only the door and maintain everything else in its original condition.
  7. When measuring a door, keep in mind that the conventional measurement only covers the door panel and does not include the frame, jamb, or the opening.

Interior doors are the most common form of door. The proper door size is determined by your requirements and standards, which must be taken into consideration when determining the placement, size, style, and building codes for the door.

Standard Interior Doors

You should be aware that replacement doors for the inside of your home (such as those for your bedroom, bathroom, or hallway) are often thinner and smaller in size than replacement doors for the exterior of your home. Because they do not have to be exposed to the environment, they are frequently left untreated because they do not have to withstand the elements. According to the International Residential Codes (IRC), both interior and exterior doors must comply with standard door criteria. Closets, on the other hand, are narrow and do not need to match those specifications.

  1. Having enough space to fit the frame and square it up before securing it to the framework of the rough opening assures that you will have enough area to finish the job.
  2. Doors that are 80 inches tall measure 6 foot, 8 inches in height, which is why they are referred to as “6/8 doors.” Doors that are 80 inches tall measure 6 foot, 8 inches in width.
  3. The most common widths for inside doors for bedrooms, baths, and hallways are between 28 and 32 inches, though there are other sizes available.
  4. If your door is higher or wider than 36 inch, the recommended thickness is 1 3/4 inch.

Standard Exterior Doors

When it comes to external door installation, these models are often larger and constructed of thicker treated wood, since they are exposed to the environment and must withstand the elements. When it comes to sliding doors, the usual width and height might vary, however the typical height is 80 inches and the average width is 6 feet. Height: Like standard interior doors, standard exterior doors should be at least 80 inches tall to be considered appropriate. In regular dimensions, they have a maximum length of 96 inches.

If you want something smaller, you may get them in normal sizes of 30 or 32 inches wide.

Exterior Doors are available for purchase.

Despite the fact that it appears to be straightforward, there is a certain amount of expertise involved in cutting the appropriate sizes. To precisely measure a door, follow these procedures so that you may have the information you need to pick the appropriate size.

Tip!

It is usually preferable to round down to the closest inch since a door that is a fraction of an inch smaller will fit perfectly, but a door that is significantly larger may not fit at all.

Measure for Door Slab Replacement

The measurements you’ll need may vary depending on whether you’re replacing the door slab alone or whether you’re rebuilding the door frame and hinges as well. Alternatively, if the frame and hinges are in good shape and you choose to maintain them as is, you may only require knowledge on how to measure for a replacement door slab. Because there are no other features to take into consideration, taking these measures is much simpler.

Tip!

Before replacing your door, make sure to measure the present door frame rather than the door itself in order to obtain the proper measurements for your replacement door. Width:To determine the width of the door, you must take three measures from the inside of the door frame. Run the tape measure along the width of the door frame three times, starting from the left and ending at the right. Begin with the top of the page, then the middle, and finally the bottom. The width of the door will be determined by the measurement that is the smallest of these measures.

  • The height will be the smallest of all the lengths.
  • In the case of changing only the door slab and leaving the frames alone, you must make certain that the new door has the same thickness as the old one before installing it.
  • Additionally, you should measure the rebate in the frame, which is where the door rests when it is shut.
  • The following are some extra measurements that must be taken in order to achieve a precise fit when measuring a door: 1.
  • Calculate the distance between the three hinges. Measure the distance from the top of the door to the top of each hinge to do this. The width and height of each hinge need to be measured. Measuring distance between the top of the door and the center of the hole for the door handle (bore hole). It’s a good idea to completely remove the door handle in order to get the most accurate measurement possible. It is also necessary to measure the distance between the center of the bore hole and the nearest door edge.
See also:  What Is The Average Cost Of Interior Painting

Accessory Hardware for Doors is available for purchase. Swing: When you are taking door measurements, you will also need to take note of the direction in which the door swings open. Stand in front of the door so that it opens outwards and away from you in order to accomplish this goal. Check to check which side of the hinges is on the door. Those who sit on the left will be closer to the door than those who sit on the right. If they sit on the left, it indicates the door is closer than those who sit on the right.

Exterior prehung doors are typically constructed of a four-sided frame with a threshold, with many of them also include an exterior trim piece.

The method for measuring a door to replace with a prehung model will differ depending on whether you are replacing an existing door or putting it in a spot where there was previously no door installed. Any modifications will almost certainly need a change in the approximate opening size.

Replace an Existing Door

To replace an existing door, start by removing any trim that prevents you from getting to the door frame itself and measuring it. Dimensions: Measure the width from the outside jamb on one side to the outer jamb on the other side using a tape measure. Make careful to take measurements from the top, center, and bottom, and use the smallest measurement as the width of the container. Measure the height of the door by running a tape measure from the sill to the top jamb. Internal doors should be measured from the floor up, and exterior doors should be measured from the door sill up if they are interior doors.

To determine the thickness, start at the inside edge of the side jamb and work your way out to the external edge.

Installing a New Door

Making a door for a spot where there was never a door before takes a bit more time and work than you may expect. You’ll need to start with the rough opening, which is the place in the wall where the door frame will be installed first. A rough opening is often 2 inches wider than the door width and 2 1/2 inches taller than the door height, with the rough opening being 2 1/2 inches wider than the door height. This additional room helps your door and door frame to sit level and square while yet providing adequate space for the door to expand and contract in response to the changing weather conditions.

  1. Take three measurements at the top, middle, and bottom, then use the least figure to determine the width of the table.
  2. It’s important to take three separate measurements and use the least value to determine the height.
  3. Place the tape measure against the wall of the rough aperture and make a note of the measurements.
  4. The process of replacing doors isn’t difficult if you take the proper measurements and are familiar with the fundamental anatomy of the door.

Interior Door Slab Measuring Guide

  • Create product category relationships for projects on the department page in administration.

It is simple to take measurements for new inside doors. Simple procedures should be followed in order to establish the size of door you will require: Determine if you are merely changing the slab or whether you are rebuilding the complete unit. In the event that you are merely replacing the door slab and keeping the frame and trim in place, you should follow these slab measurement instructions.

Please refer to the unit measurement recommendations on our website if you are replacing the door unit in your home or business. Bring this sheet into your local Curtis Lumber store once you’ve taken some measurements on it.

Measuring for a Slab:

1. Remove the door slab from the hinges so that you may take accurate measurements. 2. Measure the length and breadth of the door slab and mark the measurements on the schematic in the relevant locations. 3. Measure the distance between the top of the door and the center of the lockset and make a note on the schematic to indicate the measurement. Make certain that your measuring tape is flat and that you are confident in your measurement. 4. Take a measurement from the top of the door to the top of each of the hinges and make a note on the diagram to indicate the measurement.

  • Draw a circle around the hinge style and make a note on the door slab where the hinges are currently located.
  • The space between the end of the hinge and the edge of the door slab is referred to as the Hinge Reveal.
  • Seventh, circle the Backset Latch Style and write the backset distance, which is the distance between the edge of the door and the midline of the doorknob, in the appropriate place.
  • 8.

How to Measure an Entry Door

In order to establish the size of the replacement door you will need, take measurements of your present entry door and the opening into which it will be fitted first. The fact that you have these dimensions written down before you begin shopping for a new door will assist you in ensuring that your new replacement door will fit and will make the entire process lot more enjoyable from the beginning. Determine the size of the door: Begin by taking measurements of the width and height of the current door slab.

  • For single doors and doors with sidelites, just the door slab should be measured.
  • For example, if your door is 35-7/8″ wide and 79-1/2″ tall, you’ll want to seek for a 36″ x 80″ door to fit the opening.
  • Read on to find out more Replacement of the whole external door system (door slab, frame, sill and hinges, as well as any sidelites if present) is recommended when replacing an outside door.
  • Additionally, you’ll need to take a few additional measures if you want to replace the entire system.
  • This measurement is intended to inform you of the thickness of the wall and should not include any internal trim or casing, as well as siding and any trim pieces on the exterior of the door, among other things.
  • Check the Rough Opening and Brick Opening to make sure they are correct: If you want to be sure that your new door system will fit properly, you should also take measurements of the rough opening and brick opening of your existing door.
  • Calculate the aperture, including the distance between the studs in the wall on each side of the door and the distance between the floor and the header.
  • Example: The rough opening for a 36 x 80 door should be 38-1/2″ wide by 82″ tall if the door is 36 x 80.
  • This dimension is taken between the brick or siding on the exterior of the home and the door, and it is normally 4″ wider and 2″ higher than the nominal door size.

Check out our Rough Opening Chart for more information. Watch the video below to learn how to measure your door and what equipment you’ll need for a do-it-yourself door installation.

How to Measure for a Prehung Door for Replacement

The frame of prehung doors is already connected, making them significantly easier to install than slab doors. In addition, the doorknob hole has already been cut, and the hinges have already been installed. Prehung doors, on the other hand, are delivered packed and ready to be installed, making the process a snap. You must, though, be aware of what you’re doing at all times. To ensure that you’re prepared for your next project, let’s talk about how to measure for and install a prehung door.

Selecting the Right Prehung Door for Your Project

When purchasing a prehung door, there are a number of factors to consider, as well as measurements to take:

Measure the Rough Opening

You need to ensure the door frame will fit into the rough opening. You want the rough opening to be slightly larger than the dimensions of the prehung door. (More on this in a minute).

Calculate the Jamb Width

You must first determine the jamb width, which is also known as the width of the frame or the thickness of the wall. (See below for further information on how to achieve this.)

Figure Out Your Door Swing

To establish whether you require a right-handed prehung door or a left-handed prehung door, take the time to work out how the door will open and close. Going to the hinge side of the frame and stretching your arm in the direction in which the door should open is a good way to accomplish this task. If you are reaching out with your left arm, you will want a left-handed prehung door. If you reach out with your right hand, you want a prehung door that is right-handed.

Choosing Between Outswing and Inswing

Most interior doors are inward-swinging, however before purchasing a door, make a decision on which kind you want.

Know What Material You Want

External doors are available in a variety of materials, including wood, metal (for exterior doors), MDF, and other options. Before you go shopping, be sure you know what kind of material you want.

Measure Your Doorknob

The majority of prehung doors come with the doorknob holes already cut, and they are designed to work with the majority of typical door knob styles. It is possible that certain vintage or bespoke door knobs may not fit the standard hole, therefore it is always a good idea to purchase the doorknob first to ensure that the prehung door will accept the desired knob.

How to Measure Prehung Interior Doors for Replacement

It’s important to understand how to measure for prehung doors before making your selection. If you measure the rough opening or jamb width improperly, you might wind up with a door that is inoperable.

Measure the Rough Opening

To begin, you’ll need to remove any trim that has been placed around the aperture. Then take three measurements of the distance between the studs: the distance between the center points, the distance between the highest and lowest points in the opening, and the distance between the highest and lowest points in the aperture. Identify and record the shortest of the three measures. Measure the height of the aperture from the bottom of the sill to the top of the sill on both sides and record the measurement that is the shortest of the two measures.

Because not all rough holes are perfectly square and level, you need allow for this by leaving a little additional room around the outside. The aperture should be between one and two inches bigger than the door in order to be able to shim the door into position after installation.

Measure the Jamb Width

The door jamb is simply the width of the frame of a prehung door, measured from top to bottom. To determine the width of the door jamb, just measure from the backside of the exterior trim to the backside of the internal trim on the door. Then, when purchasing an internal door, make sure to mention the width or check for it at the store.

Measure the Size of The Door

You will need to have a general concept of the size of the door you desire. If you still have the original door, it’s really simple to replace it. Simply take the measurements of the previous door’s width and height and round them up to the nearest half-inch. If you don’t have the door to use as a reference, remember that most doors are around 6 x 8 feet in size, with a width of two feet and six inches in breadth.

How to Install a Prehung Interior Door

It’s time to put in your new prehung door once you’ve had it measured and ordered. Here’s how to do it. First, remove the current door and frame from the opening (if applicable). Then, by sliding the door into the rough opening, you may position it in its final position. Continue to slide it until the jamb is flush with the wall. Make certain that the door opens in the appropriate area and direction. After that, use a level to confirm that the door is straight, and use shims to ensure that the jamb is aligned with the door.

As a result, you’ll need to insert shims under and between the side jambs and studs until the head jamb is level and the spaces between them are closed.

Place the shims around the latch level on the latch side of the door.

Install two finishing nails into each shim, one around an inch from each edge of the door jamb, and then attach the door frame to the studs with the remaining eight finishing nails.

Choosing the Right Prehung Interior Door

That’s all there is to it! As soon as you’ve completed these procedures, your prehung door should be installed and ready to use. Remember to take measurements beforehand and to check the door’s functioning and levelness on a regular basis during the whole installation procedure. Do you require assistance in selecting a door for your next project? Consider checking out Optiontoday, a design tool designed to assist contractors in identifying the appropriate finishing touches for their projects.

Leave a Reply

Your email address will not be published.