Area Calculator — Calculate m² for Any Shape

Split the L-shape into two rectangles, measure each one separately (length × width), then add them together. Our calculator does this automatically — just enter the dimensions of both rectangles. This method works for any room that can be divided into rectangular sections.

A typical UK living room is around 15-20 m² (roughly 4m × 4.5m). A standard double bedroom is about 12-15 m², and a single bedroom is around 7-10 m². These are useful benchmarks when estimating materials for flooring, painting, or plastering.

Multiply the area in square metres by 10.764 to get square feet. For example, 10 m² = 107.64 ft². Our calculator shows both units automatically. This conversion is handy when working with American-sourced materials or older UK plans measured in imperial.

This calculator gives you the pure mathematical area. For materials like tiles, flooring, or carpet, you should typically add 10% for wastage (cutting and fitting). For irregularly shaped rooms or diagonal laying patterns, add 15%. Use our specific material calculators for wastage-inclusive estimates.

Break the room into simple shapes. Measure the main rectangular area first, then measure any bay windows or alcoves as separate rectangles or triangles and add them to the total. For a bay window, you can often approximate it as a trapezium (two parallel sides and a height).