How frequency conversion works
Every frequency unit has a fixed ratio to the hertz (Hz), one cycle per second. The value is first converted to hertz, then into the target unit.
Common values
| Value (rpm) | Result |
|---|---|
| 0.1 rpm | 0.00166667 Hz |
| 0.25 rpm | 0.00416667 Hz |
| 0.5 rpm | 0.00833333 Hz |
| 1 rpm | 0.0166667 Hz |
| 1.5 rpm | 0.025 Hz |
| 2 rpm | 0.0333333 Hz |
| 3 rpm | 0.05 Hz |
| 5 rpm | 0.0833333 Hz |
| 10 rpm | 0.166667 Hz |
More detail
Where each unit is used
Hz/kHz are common for audio and electrical signals, MHz/GHz for radio and CPU clock speeds, and rpm (revolutions per minute) for motors, engines, and hard drives. rpm converts to Hz by dividing by 60, since one revolution per minute is one-sixtieth of a revolution per second.
Hertz in daily life. 1 Hz is one cycle per second, so 60 RPM = 1 Hz. Mains power runs at 60 Hz in Korea and the US, but 50 Hz across most of Europe.
Frequently asked questions
How many hertz is 60 rpm?
60 rpm = 1 Hz, since 60 revolutions per minute equal 1 revolution per second.
How many megahertz is 1 gigahertz?
1 GHz = 1,000 MHz, using the standard SI prefix ratio.
What is a 3.5 GHz CPU clock in hertz?
3.5 GHz = 3,500,000,000 Hz (3.5 billion cycles per second). Enter 3.5 above with GHz → Hz to see it computed.
How do I convert motor rpm to a frequency in Hz?
Divide rpm by 60. For example, a 1800 rpm motor runs at 1800 ÷ 60 = 30 Hz.