Calculate the area of a room or space in square feet and square metres.
Calculated instantly in your browser.
How do you calculate square footage?
Area = length × width × number of areas, where 1 m² = 10.764 ft² and 1 yd² = 9 ft². For example, a 12 ft × 10 ft room is 120 ft² (about 11.15 m²). For non-rectangular rooms, split the space into rectangles, calculate each, and add them together. The tool also converts to square metres and square yards.
Understanding your result
For non-rectangular rooms, split the space into rectangles, calculate each, and add them together.
Formula and method
Area = length × width × number of areas. 1 m² = 10.764 ft²; 1 yd² = 9 ft².
Worked example
A 12 ft × 10 ft room is 120 ft² (about 11.15 m²).
How to use this tool
- Enter the length and width.
- Choose feet or metres and how many areas.
- Optionally add a price per unit area, then press Calculate.
About the Square Footage Calculator
The Square Footage Calculator works out the area of a room or space and converts it between square feet, square metres and square yards.
Frequently asked questions
How do I find square footage for flooring?
Measure each room’s length and width, calculate the area, then add 5–10% for cuts and waste.