Free geometry area calculator

8 shapes supported
Free no sign-up
4 decimals precision
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Area Calculator

How area calculation works

Area measures the 2-dimensional space a shape occupies, always expressed in square units — in², ft², cm², m², etc. Each geometric shape has a dedicated formula derived from its properties. This calculator applies the exact formula and shows you the full working, so you understand the result — not just the number.

Frequently asked questions