Formulas
- Rectangle: length × width
- Triangle: base × height ÷ 2
- Circle: π × diameter² ÷ 4
- Trapezoid: (base 1 + base 2) ÷ 2 × height
Example
A 12 × 10 ft room is 120 sq ft. For flooring with 10% waste, buy 132 sq ft.
Frequently asked questions
L-shaped room?
Split it into two rectangles and add them.
See also
Results are estimates for information only and are not financial, legal or medical advice. Rates, taxes and fees vary — confirm with a professional or your lender.