how to measure door for replacement

How To Measure a Door For Replacement

Door Replacement, Home Maintenance & Remodeling Services / by admin

Need a new door but first, have to figure out how to measure a door for replacement? This guide makes measuring for door replacement easy and quick so you can get the replacement door of your dreams and be an expert in how to measure doors.

How to measure for a storm door?

Whether you are getting a storm door frame replacement or a total storm door replacement, the first thing you always need to do is gather accurate measurements. You can figure out how to measure a door for replacement by following the three simple steps below.

How To Measure a Door For Replacement storm door
How To Measure For A Storm Door

Step 1

The first step for taking storm door measurements is to measure the height of the door.

You need to place your measuring tape in the center of the door.

Go from the door sill itself at the bottom, all the way up to the trim at the top of the door. 

Step 2

Next, you will need to measure the width of the door.

You are going to take this measurement in two separate places.

The first place is at the top of the door. The second is towards the bottom. 

For each of these measurements, start by measuring from the trim on the left side of the door and go all the way to the right side of the door.

If there are different depths for the trim on your doorway, be sure to measure from the outside trim. 

Step 3

Finally, you need to measure how deep the exterior trim is on the side and the height of the exterior trim at the top of the door frame.

Depending on the storm door replacement you choose you might need to know the door handle clearance.


How to measure for a screen door?

Follow these three easy steps if you are looking for a screen door replacement and figuring out how to measure a door for replacement. 

How To Measure a Door For Replacement screen door
How To Measure For A Screen Door

Step 1

You can start taking screen door measurements by first measuring the width.

Measure from the edge of the trim on the left side of your door to the edge of the trim on the right side of your door. 

You will repeat this process three times for the top, middle, and bottom of your door.

If you find variation between the three measurements, then be sure to use the largest as your number for width. 

Step 2

Next, measure the height of your door.

On the left side of your door, measure from the door sill at the bottom up to the edge of the trim at the top. 

Repeat this process for the right side of your door. Take the measurement that has the most height as your number for the height of your door. 

Step 3

Finally, measure how deep your trim is on the side of your door and the height of the trim at the top. 


How to measure for a prehung door?

Prehung door measurements can be trickier than other doors. However, the following four steps will make the process quick and straightforward. 

How To Measure a Door For Replacement prehung door
How To Measure Prehung Door

Step 1

To measure for a prehung door, you need first to pry off the interior door trim using a putty knife. This trim hides the door frame, which is what you must get a measurement of. This is called the rough opening.

Step 2

After this, take three measurements of the width of the newly exposed door frame. First, across 3 times from the top, middle, and bottom of door.

Measure to the newly exposed door frame.

Step 3

Finally, take 2 vertical measurements for the height, starting from the left side to the right side.

Make a note of the smallest size.

Step 4

Now measure the thickness. Open the door and measure the thickness.

If you want to replace the door + the frame, measure with the frame.

Now you have the width, height, and thickness to replace your prehung door!


How to Measure a Door For Replacement Tips

  • Watch for the door swing. Find out if your door has left or right-handed swing to determine if it opens inward or outward. To figure this out, open the door and turn your back to the door hinges. If your door opens on your right, the swing is right-handed and vise versa.
  • Climate can change your door measurements! The frame and door can contract and expand. Warm weather causes expansion, whereas cold weather causes contraction. 

Replacement Door and Frame Company

Measuring for a door replacement and frame is the first step to getting the replacement door and frame perfect for your style and budget. 

Green T Services truck in the driveway of a residence
Green T Door Replacement

Homeowners in Chicago and all of the surrounding suburbs have trusted Green T Service for high-quality door replacement services for over 14 years. Call us today for a free estimate.

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