Cone volume calculator

Cone volume = π × radius² × height ÷ 3. Slant height = √(radius² + height²).

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Radius

Height

Answer

…

Cone volume = π × radius² × height ÷ 3. Slant height = √(radius² + height²).

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

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

Assumes a right circular cone. Height is perpendicular to the base, not the sloping side.

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 Cone volume calculator

Cone volume = π × radius² × height ÷ 3. Slant height = √(radius² + height²).

Assumes a right circular cone. Height is perpendicular to the base, not the sloping side.

Next: Cylinder volume calculator

A worked example

With radius = 3, height = 4, the cone volume is 37.69911184307752.

Next: Sphere calculator

Before you use the result

Assumes a right circular cone. Height is perpendicular to the base, not the sloping side.

Example results for radius

These examples use Height: 4. They are reference calculations, not recommended settings.

Radius	Cone volume
1.5	9.42477796077
3	37.6991118431
6	150.796447372

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