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Garage Door Sizing and Measurement Calculator

Enter the dimensions of your garage door opening to determine the required door size.

Measure the width of the garage door opening from jamb to jamb.

Measure the height from the floor to the top of the opening.

How to Measure for a New Garage Door

Getting the right measurements is the first and most critical step in ordering a new garage door. An incorrect measurement can lead to a door that doesn't fit, causing installation delays and extra costs. This calculator helps you record the two most important dimensions: the width and height of the finished opening.

Frequently Asked Questions