Frequency Converter

Hz, kHz, MHz, GHz, RPM and radians per second. Convert frequency units instantly: hertz, kilohertz, megahertz, gigahertz, revolutions per minute and rad/s. Free frequency converter for RF, audio and engineering.

This tool runs 100% in your browser. Your input is never sent to any server — you can even go offline after the page loads.

About the Frequency Converter

CPU clock speeds, radio bands, audio pitches and motor speeds all live on the frequency spectrum but quote different units. This converter moves between hertz and its SI multiples, revolutions per minute for motors and rad/s for physics — updating every field from one input. Whether you are tuning an antenna or converting 33⅓ RPM to hertz, the factors are exact.

How to use the Frequency Converter

  1. Enter your frequency value.
  2. Select the unit it is measured in.
  3. Read all other units instantly.
  4. Swap units for the reverse conversion.

Key features

How do I convert RPM to Hz?
Divide by 60 — one revolution per second equals one hertz, so 3600 RPM is exactly 60 Hz. The converter handles this automatically.
What is the relationship between Hz and rad/s?
One hertz is 2π radians per second (about 6.283 rad/s), since each cycle sweeps a full circle.

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