Geometry

Surface Area Calculator

Calculate the total outside area of common three-dimensional shapes from their dimensions.

Preparing Surface Area Calculator

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Input

Pick the solid, enter its dimensions, and the calculator will return the total exterior area for that shape. 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 Surface Area Calculator

Choose the solid you are measuring, then provide the matching dimensions to calculate the full outer area.

What this calculator is for

This calculator is for packaging, painting, wrapping, and geometry questions where you need the total exposed surface of a three-dimensional object.

Tips

Surface area is measured in square units, not cubic units.
A cone needs the correct dimensions for the formula being used, so read the input labels carefully.
Choose the exact solid first because each shape has a different surface-area formula.