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Geometry

Cylinder Surface Area Calculator

Add the curved surface and both circular ends.

Let’s calculate.

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Your result
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Rounded to up to 2 decimal places.

Measurement units

Changing the input unit also selects its matching result unit. Choose another result unit to convert the answer. Input numbers stay unchanged.

SI prefixes and selected international / customary units. Coverage: SI and selected current customary units. Historical units are excluded.

See what you’re calculating

rh
Surface area = 2 × π × radius × (radius + height)

Add the curved surface and both circular ends.

Illustration not to scale.

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THE IDEA, SIMPLY

How it works

Add the curved surface and both circular ends.

FORMULA

Surface area = 2 × π × radius × (radius + height)

A worked example

Radius 3 m and height 5 m give 48π ≈ 150.7964 m².

Formula & detailed explanation

Right circular closed cylinder. Radius and height nonnegative.

Calculations use decimal arithmetic with 40 significant digits internally. Choose 0–8 decimal places for the displayed result. Trailing zeros are omitted. Rounding affects only the displayed and copied result; very small values may round to zero. Accepted inputs have up to 100 characters and magnitudes from 10⁻¹⁰⁰ to 10¹⁰⁰, plus zero.

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