Square metre calculator
Multiply the length by the width in metres to get square metres. One square metre is 10.76 square feet, so a 4 × 3 m room is 12 m² or 129.2 sq ft.
- Square feet
- 129.17 sq ft
- Square yards
- 14.35 sq yd
- Square centimetres
- 120,000 cm²
4 × 3 m.
Typical UK room sizes
| Room | Size | Square metres | Square feet |
|---|---|---|---|
| Single bedroom | 3 × 2.4 m | 7.2 m² | 78 sq ft |
| Double bedroom | 3.6 × 3.3 m | 11.9 m² | 128 sq ft |
| Living room | 5 × 4 m | 20.0 m² | 215 sq ft |
| Kitchen | 4 × 3 m | 12.0 m² | 129 sq ft |
| Bathroom | 2.5 × 2 m | 5.0 m² | 54 sq ft |
| Single garage | 5.5 × 3 m | 16.5 m² | 178 sq ft |
Example sizes only. Measure your own room.
Square metres to square feet
| Square metres | Square feet | Square feet | Square metres |
|---|---|---|---|
| 1 m² | 10.76 sq ft | 10 sq ft | 0.93 m² |
| 5 m² | 53.82 sq ft | 50 sq ft | 4.65 m² |
| 10 m² | 107.64 sq ft | 100 sq ft | 9.29 m² |
| 20 m² | 215.28 sq ft | 200 sq ft | 18.58 m² |
| 50 m² | 538.20 sq ft | 500 sq ft | 46.45 m² |
| 100 m² | 1,076.39 sq ft | 1000 sq ft | 92.90 m² |
How we calculate this
We turn your measurements into metres, work out the area for the shape, then convert it to other units.
We use the exact UK legal definitions: a yard is 0.9144 metres, a foot is a third of a yard (0.3048 m) and an inch is a 36th of a yard (2.54 cm).
Questions people ask
How do I work out square metres?
Measure the length and width in metres and multiply them. A room 4.2 m long and 3.5 m wide is 4.2 × 3.5 = 14.7 m². If you measured in centimetres, divide each by 100 first.
How many square feet in a square metre?
10.7639. To turn square metres into square feet, multiply by about 10.76. To go the other way, divide by 10.76.
How do I measure an L-shaped room?
Split it into two rectangles, work out the area of each and add them together.
Do I add or multiply the length and width?
A common slip is to add the length and width together. Area always multiplies: 4 m by 3 m is 12 m², not 7.
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