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Garage door tool

Garage Door Size Finder

Find the standard nominal garage door size from your number of cars, with a reminder to measure the actual rough opening before you order.

Screening estimate only.A professional measurement and an installer quote are authoritative for final door size, opener choice, and installed price.

Screening result

Choose the number of cars to see a standard nominal size.

Fine Print and Sources

Screening estimate only. These tools use only the values you enter and simple planning math. A professional measurement and an installer quote are authoritative for final door size, opener choice, hardware, and installed price.

Single garage doors are commonly 8 ft or 9 ft wide by 7 ft tall, and double doors are commonly 16 ft wide by 7 ft tall. Doors 8 ft tall are available for taller vehicles. Always measure the actual rough opening before you order, because nominal sizes are a starting point only.

  • DASMA: the Door and Access Systems Manufacturers Association publishes residential garage door standards and technical data sheets.
  • DASMA residential garage doors: describes common residential door sizes and why the rough opening measurement governs the order.