ContractorHandbook

How Many Square Feet Is a 20x24 Garage?

Total area

480 sq ft

Twenty feet by twenty four feet.

length x widthextralength, ftwidtharea x how many, plus anything odd shaped, in feet, yards and meters
Every material calculator on the site starts here, which is why this one also gives square yards and square meters. Odd shapes get broken into rectangles and added on, because a rectangle is the only shape a tape measure is honest about.

How that number is worked out

These are the figures this page was built with and every line the calculator produces from them. Change anything above and all of it moves.

  • Length20 ft
  • Width24 ft
  • How many rooms or areas this size1
  • Extra area to add0 sq ft

Total area480 sq ft

One area480 sq ft
Times 1, plus extra480 sq ft
Square yards53.33
Square meters44.59
Perimeter of one area88 ft

What else matters here

Four hundred and eighty square feet, and the most common two car garage built in the United States.

Twenty feet of width is the practical minimum for two cars: two mid size vehicles are about 6 feet wide each, which leaves roughly 8 feet split across three gaps, and that is enough to open a door but not enough for a person to walk between them with shopping. Twenty two by twenty four is noticeably better. Twenty four feet of depth takes a full size pickup at around 19 to 20 feet with a few feet at the end for a bench or a mower, which is what the depth is really for.

What this calculator assumes

  • Length times width, times how many areas are that size. For an L shaped room, split it into two rectangles and run this twice.
  • Square yards are square feet divided by nine, which is how carpet is still quoted in much of the country.

Questions people ask

How many square feet is a 20x24 garage?

480 square feet, which is 53.33 square yards and 44.59 square meters.

Is 20x24 big enough for two cars?

It is the common standard and it works, but it is tight. Twenty two or twenty four feet of width makes opening both doors much easier.

How deep should a garage be?

At least 22 feet for a full size pickup, and 24 feet if you want a workbench or storage across the end wall.

Different numbers?

The square footage calculator takes any dimensions you like and hands back the same list.

Other common sizes