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Conical frustum volume

Formula: πh(R² + Rr + r²) / 3

Radius a

Radius b

Height

Measurement unit

Calculated volume

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Enter dimensions in the same unit. Results are shown in square or cubic units. Geometric volume measures internal capacity only when the dimensions describe the interior.

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Choose a shape

Each shape has its own calculator with labelled dimensions, validation and measurement units.

Rectangle

Formula: l × w

Triangle

Formula: Heron’s formula

Circle

Formula: πr²

Trapezoid

Formula: (a + b)h / 2

Parallelogram

Formula: bh

Ellipse

Formula: πab

Circle sector

Formula: πr²θ / 360

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Conical Frustum Volume Calculator