Area Calculator
Calculate the area of common geometric shapes — circle, triangle, rectangle, trapezoid, and more.
Area
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Perimeter
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Select a shape
How It Works
Select a geometric shape, enter the required dimensions, and the calculator will compute the area and perimeter instantly. Each calculation shows the formula used for reference.
About this Calculator
The Area Calculator is a free, easy-to-use tool for geometry, space, perimeter. Simply enter your values and get instant, accurate results — no signup, no ads, no tracking. All calculations run locally in your browser, so your data stays completely private.
Privacy Note: All calculations are performed locally in your browser. No data is ever sent to a server or third party.