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Conical Frustum Curved Surface Area

Calculate curved surface area using the conical frustum curved surface area formula.

Curved surface area: -
Visual representation

Conical Frustum Curved Surface Area diagram

The diagram updates with your entries and is illustrative, not necessarily drawn to scale.

Calculation explained

How this result was calculated

The formula, your substituted values, and the evaluated result are shown below.

Reference: Formulae and Tables, State Examinations Commission (2014), page 12.
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How the Conical Frustum Curved Surface Area works

This calculator applies the formula given in Formulae and Tables, State Examinations Commission (2014), page 12. Enter values in consistent units.

Formula and inputs

Math.PI × (r1+r2) × slant

Inputs: Radius r₁, Radius r₂, Slant height.

Using the result

The result is rounded to 4 decimal places. Check units, assumptions and significant figures before using the answer.

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