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  1. Home
  2. Units & math
  3. Square footage calculator
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Square footage calculator

Total floor area room by room for rectangles, L-shapes, circles and triangles, subtracting cut-outs, with waste allowance and cost estimate.

This tool is in beta

Still being tested. If a result looks wrong, tell us.

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Enter a length and width in every row to total the floor.

This is raw geometry over the numbers you type. It is not a measurement to ANSI Z765, IPMS or RICS rules, which is what listed-property floor areas are held to, and it does not handle curves; split an odd room into extra rows instead. Conversions are exact (1 ft = 0.3048 m, 1 sq yd = 9 sq ft) and only the display rounds. Everything is worked out in this tab and nothing you type is sent anywhere.

Rooms

Rooms
Cut-outsStairs, hearths, islands
More settings▾
Empty = no cost
Price basis
5 to 15 for flooring, 0 to 100 allowed

The cost estimate prices the to-buy area, net plus waste, at your price. It is arithmetic on the numbers you typed, not a supplier quote.

Every measurement field takes tape formats: 12'6", 12 ft 6 in, 12 6, 12.5, 6 1/2", 3.8 m, 380 cm, 3 m 20 cm. A bare number reads in the row's unit.

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