Revolutions per minute to hertz

Multiply revolutions per minute by 0.0166667 to get hertz.

1 rpm = 0.0166667 HzBIPM SI

Convert

rpm

16.6667Hz

1,000 rpm = 16.6667 Hz

How to convert revolutions per minute to hertz

The hertz is the SI unit of frequency, one cycle per second. The revolution per minute is revolutions per minute, one sixtieth of a hertz — a rotational-speed unit.

Worked example — 1,000 rpm: 1,000 × 0.0166667 = 16.6667 Hz.

Revolutions per minute to hertz table

Common conversions. The reverse table is on hertz to revolutions per minute.
Revolutions per minute	Hertz
60 rpm	1 Hz
120 rpm	2 Hz
300 rpm	5 Hz
600 rpm	10 Hz
1,000 rpm	16.6667 Hz
1,500 rpm	25 Hz
3,000 rpm	50 Hz
3,600 rpm	60 Hz
7,200 rpm	120 Hz

Reverse and related

hertz → revolutions per minutereverse conversion Hz → kHz1 Hz = 0.001 kHz kHz → Hz1 kHz = 1,000 Hz MHz → GHz1 MHz = 0.001 GHz GHz → MHz1 GHz = 1,000 MHz kHz → MHz1 kHz = 0.001 MHz

About revolutions per minute and hertz

Revolution per minute (rpm)

1 rpm = 0.0166667 Hz

Definition. Revolutions per minute, one sixtieth of a hertz — a rotational-speed unit

History and origin

Revolutions per minute counts full turns each minute, and became the everyday measure of rotational speed with engines and machinery. One rpm is one sixtieth of a hertz.

Current use

rpm is used for engine and motor speed, record-player speeds like 33 and 45, and the spin rate of hard drives.

Source: BIPM SI Brochure (2019); ISO 80000-3

Hertz (Hz)

1 Hz = 60 rpm

Definition. The SI unit of frequency, one cycle per second

History and origin

The hertz is the SI unit of frequency, one cycle per second, named after Heinrich Hertz, who first produced and detected radio waves in the 1880s. It replaced the older term cycles per second.

Current use

Hertz measure screen refresh rates, audio pitch and the frequency of mains electricity.

Source: BIPM SI Brochure (2019); ISO 80000-3

Where people use this

Revolutions per minute: engine and motor speed, record players, hard drives. Hertz: refresh rates, audio, mains power. 3600 rpm is 60 Hz.

How we know this is right

The factor is fixed by the standards that define the units, not chosen — so it is exact, not a measurement:

1 Hz = 60 rpm, so 1 rpm = 1 ÷ 60 = 0.0166667 Hz.

Every value is carried to full double precision; the display is rounded.

Both units are defined in BIPM SI Brochure (2019); ISO 80000-3.

Questions people ask

How many Hz is 3600 rpm?

3600 rpm is 60 Hz.

How many Hz in one rpm?

One rpm is one sixtieth of a hertz, about 0.0167 Hz.

How many Hz is 1500 rpm?

1500 rpm is 25 Hz.

All revolution per minute conversions

Hertz to revolutions per minute1 Hz = 60 rpm