Revolutions per minute

Revolutions per minute
A car's tachometer marked in multiples of a thousand rpm
General information
Unit ofRotational speed, rotational frequency
Symbolrpm, r/min
Conversions
1 rpm in ...... is equal to ...
   SI accepted units   1 min−1
   SI units   1/60 Hz = 0.016 Hz
   SI base units   0.016 s−1

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.