Frequency Converter — Hz, kHz, MHz & RPM

Convert between hertz, kilohertz, megahertz, gigahertz, RPM, and radians per second.

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How this conversion works. Every unit is converted through the hertz (SI); rotational units use exact 1/60 and 1/(2π) relations per the BIPM SI Brochure.

How to use

  1. Choose the units to convert from and to.
  2. Enter a value — the converted result updates instantly.
  3. Click Copy to copy the result to your clipboard.

Frequently asked questions

How do I convert hertz to revolutions per minute?

1 hertz = 60 revolutions per minute. Choose "Hertz (Hz)" as From and "Revolutions per minute (RPM)" as To, type a value, and the result updates instantly.

How do I convert RPM to Hz?

Divide RPM by 60. A motor at 3,000 RPM spins at 50 Hz; a 7,200 RPM hard drive spins at 120 Hz.

What is the difference between Hz and rad/s?

Hz counts full cycles per second; rad/s measures angular velocity. One cycle is 2π radians, so ω (rad/s) = 2π × f (Hz). AC mains at 60 Hz is 376.99 rad/s.

Is my data sent to a server?

No. Conversions run entirely in your browser using fixed factors — nothing is uploaded or logged.

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