How to Measure Garage Door Width

Follow these steps to accurately measure your garage door width based on your track configuration.

Step 1: Identify Your Track Configuration

Before measuring width, identify your track configuration. Different configurations require different measurement approaches:

Low Headroom Track Configuration

Low Headroom (0-3")

Minimal space between top of door and ceiling. Common in older garages or converted spaces.

12-inch Radius Track

12" Radius Track

Standard residential configuration. Most common in typical home garages.

15-inch Radius Track

15" Radius Track

Larger radius for taller doors or commercial applications.

Step 2: Measuring Door Width

To measure the door width:

  1. Measure from the inside edge of one track to the inside edge of the opposite track
  2. Measure at three points: bottom, middle, and top
  3. Use the smallest measurement if there are variations
  4. Record measurement to the nearest inch
Width Measurement Points

Step 4: Track Clearance Requirements

Low Headroom (0-3")

  • Minimum ceiling height: door height front mount + 6"
  • Minimum ceiling height: door height rear mount + 2
  • Back room = Door height + 18"

12" Radius

  • Minimum ceiling height: door height + 12"
  • Side room: 4" minimum each side
  • Back room = Door height + 18"

15" Radius

  • Minimum ceiling height: door height + 15"
  • Side room: 4.5" minimum each side
  • Back room = Door height + 20"

Step 5: Verify and Proceed

After confirming your measurements and track configuration, use our spring calculator to find the right spring specifications for your door.