How Do You Measure The Opening For A New Garage Door?

How To Measure For A New Garage Door Installation

5 Steps to Measure For A Garage Door

Ready to get a new replacement garage door installed at your home? Maybe you’re putting in a new door for the first time. The first step in purchasing a new garage door is to figure out what size door you need. It’s extremely important that this measurement is correct in order to ensure a seamless installation. You may think a quick measurement of the door or opening’s height and width is enough, but there are a few other measurements you will need to take in order to properly measure your garage door.

All you need to begin the measurement process is a tape measure. In the video below, our Overhead Garage Door Technician, George, walks you through the process of measuring the opening for a new garage door. We have outlined the steps below as well.


  1. First, measure the width of the door. This is the distance between the left and right sides of the finished opening. You’ll want to make sure you take the measurement at the door’s widest point, in feet and inches.
  2. Next, measure the height of the door. You’ll also take this measurement at the door’s highest point, from floor to the top of the finished opening. It’s important that you take this measurement in three spots: left, center, and right sides of the door. If one side of your opening is sagging – it can cause several issues with the garage door installation.
  3. Measure the width of the area next to the openings, 3-3/4” is required on each side for installation of the vertical track. Note that the inside of the garage door should be framed with wood jambs, indicated by the dotted lines in the image below.
  4. After that, you’ll need to measure the distance from the top of the opening to the ceiling. This is called the headroom. You’ll measure from the header to the lowest point is at least 6 inches to ensure you have enough clearance for your torsion system and the opener together.
  5. Measure the distance from the opening to the rear of the garage. This is called the backroom.

If your home has multiple garage doors, it’s important that you measure each one – even if you believe they are the same size. There may be a small difference and could cause issues with your garage door installation.


How To Measure For A New Garage Door Installation

Common Garage Door Sizes

     • Single-car garage doors are typically 8’ or 9’wide.

     • Double-car garage doors are usually 16’ wide.

     • Overhead garage doors are usually 7’ or 8’ high but can also be 10 feet tall or more.

Once you know all your measurements, you can now order a door. Not sure what door to choose? You can head to our Residential Garage Doors page for videos explaining each model we offer. Once you’ve narrowed down your model selection, you can test out or Garage Door Designer to help choose what color and design options you’d like for your new door.

If you’re ready to purchase your door, give us a call. We will come out and verify your measurements, give you a free estimate on the door of your choice, and get your door ordered. Please note that measurements are used for pricing only. Absolute Overhead Door will have to re-measure your door prior to ordering to assure proper fit. Depending on the door you choose, we could have it installed as quickly as the next day to up to three weeks.

Ready to schedule a free estimate? Give us a call at (502) 273-5153 or book directly online below.

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