ContractorHandbook

How Many Square Feet Is a 14x20 Room?

Total area

280 sq ft

Fourteen feet by twenty 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.

  • Length14 ft
  • Width20 ft
  • How many rooms or areas this size1
  • Extra area to add0 sq ft

Total area280 sq ft

One area280 sq ft
Times 1, plus extra280 sq ft
Square yards31.11
Square meters26.01
Perimeter of one area68 ft

What else matters here

Two hundred and eighty square feet, which is a primary bedroom in a new build or a good sized family room.

At this size the paint quantity stops being obvious, because paint follows the walls and not the floor. The perimeter here is 68 feet, so at nine foot ceilings the walls are 612 square feet gross, roughly 550 after a door and a couple of windows come out. Two coats is 1,100 square feet of coverage, which is four gallons at 350 square feet a gallon, and that is before the ceiling. The floor area, 280, has nothing to do with it.

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 14x20 room?

280 square feet, which is 31.11 square yards and 26.01 square meters.

How much paint for a 14x20 room?

About four gallons for two coats on the walls at nine foot ceilings, before the ceiling itself. Paint follows wall area, which is perimeter times height.

Why is wall area bigger than floor area?

Because it is the perimeter times the ceiling height. A 14 by 20 room has 280 square feet of floor and over 600 square feet of wall.

Different numbers?

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

Other common sizes