How To Measure Garage Door Size. Here’s what you need to do: This is the distance between the right and left sides of the finished opening.
Typically, we allow for 9 to 10 feet in width per car and 20 to 24 feet in depth. Measure the width of the opening at the widest point. This is the distance between the right and left sides of the finished opening.
Measure the width of the opening at the widest point.
Generally, when looking from within the garage, if the spring is on the left side, it is right wound, and vice versa. Measure only the open area of your garage door jam to door jam or side to side. The standard commercial overhead garage door measures 32 feet, 2 inches wide by 24 feet, 1 inch high. For best results, the inside of the garage door opening should be framed with 2 x 6 wood.