Calculator © - Free Online Calculators

Online Calculators since 2009

A Frustum is a three-dimensional geometric shape which resembles a cone with the top cut off.

The top and base diameters are parallel and on the centre of axis.

Calculations can be saved to a table by clicking the "Add to Table" button (the table appears the first time the button is clicked)

There is also the option to create a PDF document

*Slope Height (s) = √((r2 - r1) ^{2}+h^{2})*

*Surface area of top (T) = πr1 ^{2}*

*Surface area of base (B) = πr2 ^{2}*

*Lateral surface area (L) = π x (r1 + r2) x s*

*Total area = T + B + L*

*Volume = (1/3) x π x h x (r1 ^{2} + r2^{2} + (r1 * r2))*

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