Square metre calculator
Pick a shape and enter its measurements in metres. Add a price per m² if you want a cost estimate too.
Measuring in feet and inches? Use the US version
Area
14 m²
- Square feet
- 150.7 sq ft
- Square centimetres
- 140,000 cm²
How it works
A rectangle’s area is length × width. A circle is π × radius², where the radius is half the diameter. A triangle is base × height ÷ 2, with the height measured straight up from the base.
For an L-shaped room or an irregular garden, split it into rectangles and triangles, work out each one and add them together. Measurements in centimetres convert to metres by dividing by 100: 350 cm is 3.5 m.
Example
With shape: rectangle or square, length 4 m, width 3.5 m, how many of these 1, the answer is 14 m².
Tips before you buy
- Measure wall to wall at floor level, and round up to the nearest centimetre.
- To convert square metres to square feet, multiply by 10.76.
- Include alcoves and cupboards when ordering flooring, and take off large fixed units the floor won’t run under.
Common questions
How do I work out the square metres of a room?
Multiply the length by the width in metres. A 4 × 3.5 m room is 14 m².
How do I convert square metres to square feet?
Multiply by 10.76. 14 m² is about 150.7 square feet.
How do I measure an L-shaped room?
Split it into two rectangles, work out each area, and add them together.