Area Calculator

Calculate area for common flat shapes from the dimensions that belong to each figure.

Preparing Area Calculator

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Input

Choose the shape first, then enter the measurements that the area formula for that figure actually uses. You will see the result first and the step-by-step solution below.

Input summary

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Step by Step Calculation

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Calculate first and the full working will appear below automatically.

How to use Area Calculator

Pick the shape, enter its dimensions, and the calculator will return the enclosed area in square units.

What this calculator is for

This calculator is for classroom geometry, flooring estimates, drawing plans, and any problem that asks how much flat surface a two-dimensional shape covers.

Tips

Area is always reported in square units, not plain units.
Use the perpendicular height for triangles and trapezoids, not a slanted side.
Be sure you choose the shape mode that matches the figure you are measuring.