Frequency converter
Convert between Hz, kHz, MHz, GHz and rpm.
Frequency converter
Convert frequency between hertz (Hz), kilohertz (kHz), megahertz (MHz), gigahertz (GHz) and revolutions per minute (rpm). Useful for audio, radio, CPUs and rotating machinery. It all runs in your browser.
Useful equivalents
1 kHz = 1,000 Hz. 1 MHz = 1,000 kHz = 1,000,000 Hz. 1 GHz = 1,000 MHz. 1 Hz = 60 rpm, so 1 rpm = 1/60 Hz ≈ 0.01667 Hz.
What it’s for
- Audio: notes and sample rates in Hz / kHz.
- Radio & Wi-Fi: bands in MHz / GHz.
- Engines: rotation speed in rpm.
Frequently asked questions
How many Hz in 1 MHz? 1,000,000 Hz.
How do I convert rpm to Hz? Divide rpm by 60 — e.g. 3,000 rpm = 50 Hz.