How to use
- Choose Metric (m) or Imperial (ft) using the tabs.
- Enter the room length and width.
- The floor area updates instantly.
Formula
$$A = L \times W$$
Where L = length, W = width, and A = area (m² or ft²).
Room Area Calculator
Calculate the floor area of a rectangular room in square metres or square feet.
2.4M usesUpdated · 2026-04-23Runs locally · zero upload
Frequently asked questions about Room Area Calculator
Can I use this for non-rectangular rooms?
This calculator is for rectangular rooms. For L-shaped or irregular rooms, divide the space into rectangles, calculate each area, and add them together.
How do I convert between metric and imperial?
1 m = 3.281 ft, so 1 m² = 10.764 ft². Switch the unit tab and re-enter measurements in the desired unit.
What is a typical room size?
A small bedroom is around 9–12 m² (97–129 ft²). A living room is typically 15–25 m² (160–270 ft²).