Area calculator (m² and ft²)
Calculate the area of a room, floor, wall or plot in square metres or square feet — rectangles, L-shapes, circles, triangles and trapezoids — and estimate material cost.
Your estimate
Area
14 m²
- Area to order (incl. extra)
- 15.4 m²
- Perimeter
- 15 m
- Material cost
- £462
Estimates for planning only — not a quote, survey or financial advice.
How this is calculated
Formula
- Rectangle = length × width · L-shape = length × width − cut-out
- Circle = π × (diameter ÷ 2)² · triangle = ½ × base × height
- Trapezoid = ½ × (side A + side B) × height
- Area to order = area × (1 + extra %) · cost = area to order × price
Assumptions
- 1 m² = 10.764 ft². For irregular rooms, split the floor into simple shapes and add them up.
- Typical extra for cutting: around 5–10% for simple layouts, more for diagonal or patterned laying. Check the product's recommendation.
- The price field is an example — enter the price from your quote or the product page.