How to Calculate Square Footage
Measure the length and width of a rectangular area using the same unit, then multiply them. The calculator converts the result into square feet, square yards, and square meters.
Formula
Area = Length × Width
Worked Example
A room that is 12 feet long and 10 feet wide has an area of 120 square feet.
Measurement Tips
- Measure from finished wall to finished wall.
- Break irregular spaces into smaller rectangles.
- Add a waste allowance when ordering flooring or tile.
Calculation Standards
This tool uses documented formulas and high-precision internal values. Displayed results may be rounded for readability. Review the assumptions and verify important decisions with a qualified professional.
Read our calculation methodology