Frequency Converter: Hz, kHz, MHz, GHz and RPM
Convert electrical, radio and rotation frequencies, including motor rpm.
- Nothing you type is stored
- Free
- No signup
Revolutions per minute to Hertz
25Hz
1,500 rpm = 25 Hz
1 rpm = 0.01666666667 Hz · 1 Hz = 60 rpm
All units
| Unit | Value | Unit |
|---|---|---|
| Metric | ||
| 25 | Hz | |
| 0.025 | kHz | |
| 0.000025 | MHz | |
| 2.5 × 10⁻⁸ | GHz | |
| 2.5 × 10⁻¹¹ | THz | |
| Other | ||
| 1,500 | rpm | |
| 157.0796327 | rad/s | |
| 1,500 | bpm | |
rpm and bpm count per minute, so 60 rpm = 1 Hz. rad/s is angular speed: 2π rad/s = 1 Hz.
How to use
- Type the value in the From unit.
- Pick the unit to convert to (it starts on hertz). Search by name or symbol.
- Read the result, or tap any row in the full table to switch the target unit.
Good to know
1 Hz = one cycle per second. 1 kHz = 1,000 Hz, 1 MHz = 10⁶ Hz, 1 GHz = 10⁹ Hz.
Rotation: rpm ÷ 60 = Hz. India's grid runs at 50 Hz, so a 2-pole motor runs near 3,000 rpm and a 4-pole motor near 1,500 rpm (a little less under load).
rad/s is angular speed: 1 Hz = 2π rad/s. FM radio stations in India are 88 to 108 MHz; Wi-Fi uses 2.4 and 5 GHz bands.
Questions
How many Hz is 1500 rpm?
25 Hz.
How do I convert rpm to rad/s?
Multiply rpm by 2π/60 (0.10472).
What frequency is Indian mains power?
50 Hz.
How many MHz is 1 GHz?
1,000 MHz.
Is anything I type sent to a server?
No. The conversion runs on your device and nothing is stored.