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Square Footage Calculator

Area of a rectangle, triangle or circle in sq ft, sq yd and m².

Area

120 sq ft

Area
13.33 sq yd
Area
11.15 m²

Estimate only. Check the coverage or yield printed on the product before you buy.

How the calculation works

  1. Rectangle or square: length × width.
  2. Triangle: ½ × base × height.
  3. Circle: π × radius².
  4. Square yards = square feet ÷ 9; square meters = square feet × 0.0929.

Example

Shape: Rectangle or square · Length: 10 ft · Width: 12 ft

Result: 120 sq ft.

Tips before you buy

  • Split an L-shaped room into two rectangles and add the results.
  • Measure to the nearest inch and convert: 6 inches = 0.5 ft.
  • Always confirm coverage and yield with the manufacturer's label — products differ.

FAQ

How do I convert inches to feet?

Divide by 12. For example, 10 ft 6 in is 10.5 ft.

Sources