Revolutions per minute

Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is the number of turns in one minute. It is a unit of rotational speed or the frequency of rotation around a fixed axis.

Revolutions per minute
Unit ofRotational speed
1 rpm in ...... is equal to ...
   SI angular speed   /60 rad/s ≈ 0.1047198 rad/s
   SI frequency   1/60 Hz ≈ 0.01666667 Hz
   SI derived rotational frequency   1/60 s−1, 1/60/s
   SI derived rotational speed   1 min−1, 1/min

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