Convert RPM to Hertz (rpm to Hz)
1 revolution per minute (rpm) = 0.01666666667 hertz (Hz). 1 Hz = 60 rpm. Example: 1500 rpm = 1500 × 0.01666666667 = 25 Hz.
Also searched as rpm to Hz, rpm to hertz, revolutions per minute to hertz, r/min to Hz and convert rpm to frequency.
1 rpm = 0.01666666667 Hz
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk revolution per minute to hertz converter to paste a column from Excel.
How to Convert RPM to Hertz
- 1 rpm = 0.01666666667 Hz
- 1 Hz = 60 rpm
- Example: convert 1500 rpm to Hz: 1500 rpm = 1500 × 0.01666666667 Hz = 25 Hz
Formula
Hz = rpm × 0.01666666666667
or Hz = rpm ÷ 60
Derivation from SI units:
- 1 rpm = 1/60 revolution per second = 1/60 Hz.
- 1 Hz = 1 s⁻¹, one cycle per second.
Both units are defined exactly, so the factor is exact. RPM definition: revolution per minute; Hertz definition: hertz.
Worked examples
- A motor at 1500 rpm turns at 25 Hz.
1500 rpm × 0.01666666667 = 25 Hz - A hard drive spinning at 7200 rpm rotates at 120 Hz.
7200 rpm × 0.01666666667 = 120 Hz
RPM to Hertz conversion table
| RPM | Hertz (Hz) |
|---|---|
| 60 rpm | 1 Hz |
| 100 rpm | 1.666666667 Hz |
| 600 rpm | 10 Hz |
| 750 rpm | 12.5 Hz |
| 1000 rpm | 16.66666667 Hz |
| 1450 rpm | 24.16666667 Hz |
| 1500 rpm | 25 Hz |
| 3000 rpm | 50 Hz |
| 3600 rpm | 60 Hz |
| 7200 rpm | 120 Hz |
Where it's used
Shaft and motor speeds in rpm from nameplates and tachometers are converted to hertz for vibration analysis, sensors and frequency-based calculations. Divide by 60.
RPM to other frequency units
| Conversion | 1 rpm equals |
|---|---|
| revolution per minute to hertz | 0.01666666667 Hz |
| revolution per minute to megahertz | 1.666666667 × 10⁻⁸ MHz |
| revolution per minute to gigahertz | 1.666666667 × 10⁻¹¹ GHz |
| revolution per minute to kilohertz | 0.00001666666667 kHz |
| revolution per minute to radian per second | 0.1047197551 rad/s |
| revolution per minute to revolution per second | 0.01666666667 rps |
| revolution per minute to degree per second | 6 °/s |
| revolution per minute to beat per minute | 1 bpm |
Show 1 more units
| revolution per minute to terahertz | 1.666666667 × 10⁻¹⁴ THz |
|---|
Frequently asked questions
How do I convert rpm to Hz?
Divide by 60: 1500 rpm = 25 Hz.
What frequency does a 3000 rpm machine vibrate at?
Its running speed is 50 Hz (1×), and unbalance shows as a peak there; misalignment often adds 2× (100 Hz).
How many hertz are in 1 revolution per minute?
1 rpm = 0.01666666667 Hz.
How do I convert revolutions per minute to hertz?
Multiply the value in rpm by 0.01666666667, or divide it by 60. For example, 1500 rpm × 0.01666666667 = 25 Hz.
Is the rpm to Hz conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert RPM to Hertz (rpm to Hz). Retrieved October 25, 2026, from https://scientificconverters.com/frequency/rpm-to-hertz/
IEEE
Scientific Converters, "Convert RPM to Hertz (rpm to Hz)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/frequency/rpm-to-hertz/