How Many Square Feet Is a 15x15 Room?

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.

Length15 ft
Width15 ft
How many rooms or areas this size1
Extra area to add0 sq ft

Total area225 sq ft

One area	225 sq ft
Times 1, plus extra	225 sq ft
Square yards	25
Square meters	20.9
Perimeter of one area	60 ft

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 15x15 room?

225 square feet, which is exactly 25 square yards and 20.9 square meters.

Different numbers?

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

Other common sizes

8x10 room80 sq ft 9x9 room81 sq ft 8x12 room96 sq ft 10x10 room100 sq ft 10x12 room120 sq ft 11x12 room132 sq ft 10x14 room140 sq ft 12x12 room144 sq ft 12x15 room180 sq ft 14x14 room196 sq ft 16x16 room256 sq ft 14x20 room280 sq ft 15x20 room300 sq ft 18x18 room324 sq ft 20x20 room400 sq ft 20x30 building600 sq ft

15 more sizes are answered on the square footage calculator page