# Revolutions per minute

## Unit of rotational speed / From Wikipedia, the free encyclopedia

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For other uses, see Revolutions per minute (disambiguation).

"rpm" redirects here. For other uses, see RPM (disambiguation).

**Revolutions per minute** (abbreviated **rpm**, **RPM**, **rev/min**, **r/min**, or **r⋅min ^{−1}**) is a unit of rotational speed (or rotational frequency) for rotating machines.
One revolution per minute is equivalent to 1/60 hertz.

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