LayoutWise

Square Footage Calculator

Break the space into simple shapes, subtract anything that's not part of it, and get the total in square feet, meters, yards and acres.

Your space

Areas

Split an L-shaped or odd room into simple shapes. Mark closets, islands or cut-outs to subtract them.

Length
ft
in
Width
ft
in
Length
ft
in
Width
ft
in
Length
ft
in
Width
ft
in

Square feet

452

total

Square meters

41.99

m²

Square yards

50.22

carpet is sold this way

Acres

0.0104

43,560 sq ft each

Breakdown

3 areas
  • 1. Rectangle+384.0 sq ft
  • 2. Rectangle+80.0 sq ft
  • 3. Rectangle (subtracted)−12.0 sq ft

Ready to buy materials? Take this number to the flooring, tile, carpet or paint calculators — they add waste for cuts.

Shopping list

  • ✓Total area: 452 sq ft (41.99 m², 50.22 sq yd)
  • ✓1. Rectangle: 384.0 sq ft
  • ✓2. Rectangle: 80.0 sq ft
  • ✓3. Rectangle (subtracted): −12.0 sq ft

Add about 10% for cuts and waste when you buy flooring or tile.

How to calculate square footage

For a rectangle, multiply length by width in feet. For anything else, split it into rectangles, triangles (base x height ÷ 2) and circles (3.1416 x radius²), work each out and add them up. Subtract anything inside the space you won't be covering, like a kitchen island or a fireplace hearth.

Example: an L-shaped room made of a 24' x 16' area and a 10' x 8' alcove, minus a 4' x 3' closet, is 384 + 80 − 12 = 452 sq ft. That's 50.2 square yards or 42 square meters.

Feet and inches

Convert inches to decimal feet before multiplying: 10' 6" is 10.5 feet, 7' 9" is 7.75 feet. The calculator takes feet and inches directly and does the conversion for you.

Useful conversions

Buying flooring? The flooring calculator and tile calculator add waste for cuts and count boxes.