# Capsule (geometry)

A **capsule** (from Latin *capsula*, "small box or chest"), or **stadium of revolution**, is a basic three-dimensional geometric shape consisting of a cylinder with hemispherical ends.^{[1]} Another name for this shape is **spherocylinder**.^{[2]}

The shape is used for containers for pressurised gasses and for pharmaceutical capsules.

## Formulas

The volume of a capsule is calculated by the formula where is the radius of the cylinder and hemispheres and is the height of the cylindrical part.

The surface area formula is .^{[3]}

## References

- ↑ Weisstein, Eric W. "Capsule".
*MathWorld*. - ↑ Dzubiella, Joachim; Matthias Schmidt; Hartmut Löwen (2000). "Topological defects in nematic droplets of hard spherocylinders".
*Physical Review E*.**62**: 5081. doi:10.1103/PhysRevE.62.5081. - ↑ "Capsule Calculator". Calculatorsoup.com. Retrieved 2013-02-18.

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