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.
Assumptions and limitations
This gives a geometric area from the measurements you enter, not professional advice. Accuracy depends entirely on measuring correctly, and it does not account for waste, offcuts, skirting or awkward shapes beyond simple rectangles. For material orders, add a wastage allowance and confirm quantities with your supplier or fitter.
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.
Who should use this tool
Homeowners, renters, tradespeople and DIY planners measuring a room or space for flooring, paint, carpet, tiling or listings. Useful when you need the area in square feet, square metres or square yards, including irregular rooms you can split into rectangles and add together.
Benefits
- Calculates area and converts feet, metres and yards instantly
- Handles multiple areas so you can sum irregular rooms
- Helps estimate materials for flooring and decorating
- Private by design: nothing you enter is stored
Practical use cases
- Measuring a room before ordering flooring or carpet
- Converting between square feet and square metres
- Adding up several rectangles for an L-shaped space
- Estimating paint or tile coverage for a project
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.
How do I handle a room that is not rectangular?
Divide the space into simple rectangles, measure the length and width of each, and calculate them separately. Adding the areas together gives the total square footage. The tool lets you enter multiple areas, so you can build up an L-shaped or stepped room piece by piece.
Should I add extra when buying flooring?
Yes. The calculated area is the exact floor space, but cutting, pattern matching and mistakes create waste. Fitters commonly add a percentage on top for offcuts, and the right amount depends on the material and layout. Use the area as your base and follow your supplier's wastage guidance.