Frustum of a Cone Calculator

Your details

Radius of the larger base circle at the bottom of the frustum.
cm
Radius of the smaller base circle at the top of the frustum. Must be less than or equal to the bottom radius.
cm
Perpendicular height between the two circular bases.
cm
Total surface area
382.9477cm²

Lateral area + both base areas

Lateral surface area241.576cm²
Bottom base area113.0973cm²
Top base area28.2743cm²
Volume527.7876cm³
Slant height (s)8.544cm

Total surface area is 382.9477 cm² and volume is 527.7876 cm³.

  • The lateral (sloped) surface makes up 63.1% of the total area, while the two bases account for 36.9%.
  • The top radius is 50.0% of the bottom radius (r/R = 0.500).
  • Slant height of 8.5440 cm is the actual distance along the slope and drives the lateral area calculation.

Next stepTo find how much material you need to cover the outside only (like sheet metal or fabric), use the lateral area plus whichever bases you need to cover.

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