Tools / Area calculator (m²)
Part of the topic: 🏠 Home, energy & car
Area calculator (m²)
Choose the shape and enter the measurements in metres. For flooring add a waste allowance.
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🔒 Runs entirely in your browser – nothing you enter is uploaded or stored.
How to use it
- Choose the shape.
- Enter the measurements in metres.
- Read the area in m² – with waste allowance for floors and tiles.
Your inputs live only in the link, not on our server.
Last checked: October 2026. Found a mistake? Use the form below – we fix confirmed errors and update the date.
Frequently asked questions
How do I calculate square metres of a room?
Length × width: a 4.5 m × 3.2 m room has 14.4 m².
How do I calculate an L-shaped room?
Split it into two rectangles, calculate both and add them.
How much waste should I add for flooring?
Usually 5–10 % for laminate or parquet, more for diagonal laying.