Sphere calculator

Sphere volume = 4πr³/3. Surface area = 4πr².

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Radius

Answer

…

Sphere volume = 4πr³/3. Surface area = 4πr².

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Step-by-step calculation

Inputs are substituted below. Each line evaluates the next operation; intermediate values are displayed to 12 significant digits while the calculation uses full precision.

Saved scenario

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Formula and assumptions

Assumes a complete sphere. Use radius, not diameter; volume and surface area use cubic and square units respectively.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Sphere calculator

Sphere volume = 4πr³/3. Surface area = 4πr².

Assumes a complete sphere. Use radius, not diameter; volume and surface area use cubic and square units respectively.

Next: Cone volume calculator

A worked example

With radius = 3, the sphere volume is 113.09733552923255.

Next: Pipe volume calculator

Before you use the result

Assumes a complete sphere. Use radius, not diameter; volume and surface area use cubic and square units respectively.

Example results for radius

These examples use the formula above. They are reference calculations, not recommended settings.

Radius	Sphere volume
1.5	14.1371669412
3	113.097335529
6	904.778684234

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ToolOctopus. “Sphere calculator.” Updated 2026-09-26. https://tooloctopus.com/sphere-calculator.

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