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Door Measurement

How to Measure a Garage Door

Measuring the opening of your garage will ensure that you select the correct garage door size when buying online.

Step 1: Measure the Width Use a tape measure and measure the width (horizontal length) of the garage door opening – inside of the wood framing. This is the first number used in the size dimension.

measure door width 

Step 2: Measure the Height Use a tape measure and measure the height (vertical length) of the garage door opening at the highest point to the lowest point (the floor) inside the wood framing. This is the second number used in the size dimension.

Once you have your numbers, the first number (the width) is by (x) the second number (the height). For example, a 16’ wide and 7’ high garage door opening would be a garage door size of 16x7.

measure garage door height