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Revolutions per minute | |
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![]() A car's tachometer marked in multiples of a thousand rpm | |
General information | |
Unit of | Rotational speed, rotational frequency |
Symbol | rpm, 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.
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