Area Calculator

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About this app

Choose a shape and enter its dimensions in a length unit such as meters or feet. Calculate areas for rectangles, circles, triangles, regular polygons and more. See the perimeter when the measurements determine it, and an approximation for ellipses.

Browse worked examples, pin favorite shapes and reopen or copy previous calculations. Geometry runs on your device without an account.

What's new

Geometry calculations from dimensions, with clearer perimeter results and local history.