Frequency converter
Frequency Converter – 6 Units, Exact Factors
1 revolution per minute = 0.016667 hertz
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- 1 rpm = 0.016667 Hz
- 5 rpm = 0.083333 Hz
- 10 rpm = 0.16667 Hz
- 25 rpm = 0.41667 Hz
- HertzHz
- KilohertzkHz
- MegahertzMHz
- GigahertzGHz
- Revolutions per minuterpm
- Radians per secondrad/s
- Hertz0.016667Hz
- Kilohertz0.000016667kHz
- MegahertzMHz
- GigahertzGHz
- Revolutions per minute1rpm
- Radians per second0.10472rad/s
About frequency conversions
Hz, kHz, rpm, rad/s.
Common frequency conversions
Frequency units explained
| Unit | System | Definition and notes |
|---|---|---|
| Hertz (Hz) | SI (metric) | Base unit |
| Kilohertz (kHz) | SI (metric) | 1 kHz = 1,000 Hz (exact) |
| Megahertz (MHz) | SI (metric) | 1 MHz = 1,000,000 Hz (exact) |
| Gigahertz (GHz) | SI (metric) | 1 GHz = 1,000,000,000 Hz (exact) |
| Revolution per minute (rpm) | other | 1 rpm ≈ 0.016666667 Hz |
| Radian per second (rad/s) | SI (metric) | 1 rad/s ≈ 0.15915494 HzRadians per second, a measure of how fast something turns. 1 Hz = 2π rad/s. |
Revolutions per minute to hertz conversion table
| Revolutions per minute (rpm) | Hertz (Hz) |
|---|---|
| 0.1 rpm | 0.0016667 Hz |
| 0.5 rpm | 0.0083333 Hz |
| 1 rpm | 0.016667 Hz |
| 2 rpm | 0.033333 Hz |
| 3 rpm | 0.05 Hz |
| 4 rpm | 0.066667 Hz |
| 5 rpm | 0.083333 Hz |
| 6 rpm | 0.1 Hz |
| 7 rpm | 0.11667 Hz |
| 8 rpm | 0.13333 Hz |
| 9 rpm | 0.15 Hz |
| 10 rpm | 0.16667 Hz |
| 15 rpm | 0.25 Hz |
| 20 rpm | 0.33333 Hz |
| 25 rpm | 0.41667 Hz |
| 30 rpm | 0.5 Hz |
| 40 rpm | 0.66667 Hz |
| 50 rpm | 0.83333 Hz |
| 75 rpm | 1.25 Hz |
| 100 rpm | 1.6667 Hz |
| 250 rpm | 4.1667 Hz |
| 500 rpm | 8.3333 Hz |
| 1,000 rpm | 16.667 Hz |
Frequently asked questions
Which frequency units can I convert?
hertz (Hz), kilohertz (kHz), megahertz (MHz), gigahertz (GHz), revolutions per minute (rpm), radians per second (rad/s).
How accurate are the results?
Every unit is stored with its exact defining factor (NIST SP 811, NIST Handbook 44 or the BIPM SI Brochure). Calculations use double-precision arithmetic and are rounded only for display, to 5 significant figures by default (trailing zeros dropped, so 1 km shows as 1000 m). You can choose Auto (up to 10 digits), fixed decimals or more significant figures, or switch to scientific or engineering notation.