Area & Volume calculators
Square metres, square feet, cubic yards and more.
Before you buy
Almost every material calculation starts with an area or a volume. These calculators handle the basic shapes (rectangles, circles and triangles) and convert between square metres and square feet, and between cubic metres, cubic feet and cubic yards.
For irregular spaces, split the area into simple shapes, work out each one, and add them together. Our guide to measuring irregular areas shows how, step by step.
Quick tips
- Measure in one unit throughout, then convert at the end.
- Round measurements up, not down, when you're buying materials.
- One cubic yard is 27 cubic feet, or about 0.765 m³.
- One square metre is about 10.76 square feet.
How to measure an irregular area →
Every calculator shows its formula and sources. See how we calculate.