Rpm to Hertz
Revolutions per minute measures rotational speed, used to describe engine, hard drive, and turntable speeds. The hertz is the SI unit of frequency, one cycle per second, used for sound pitch, electrical current, and CPU clock speed. 1 rpm equals ≈0.0166667 Hz, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to frequency, measured here against frequency's base unit (Hz) — every other frequency unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
Hz = rpm × ≈0.0166667
rpm = Hz × 60
Worked example: 5 rpm × ≈0.0166667 = ≈0.0833333 Hz.
Conversion table
| RPM (rpm) | Hertz (Hz) |
|---|---|
| 1 rpm | ≈0.0166667 Hz |
| 2 rpm | ≈0.0333333 Hz |
| 3 rpm | 0.05 Hz |
| 5 rpm | ≈0.0833333 Hz |
| 10 rpm | ≈0.166667 Hz |
| 20 rpm | ≈0.333333 Hz |
| 25 rpm | ≈0.416667 Hz |
| 50 rpm | ≈0.833333 Hz |
| 100 rpm | ≈1.66667 Hz |
| 250 rpm | ≈4.16667 Hz |
| 500 rpm | ≈8.33333 Hz |
| 1,000 rpm | ≈16.6667 Hz |
Frequently asked
- How many Hertz in a rpm?
- 1 rpm equals ≈0.0166667 Hz.
- How do I convert RPM to Hertz?
- Multiply the value in rpm by ≈0.0166667 to get Hz. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — RPM and Hertz are both defined by a fixed conversion factor to frequency's base unit (Hz), so the result shown is exact to the precision displayed, not an approximation.