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. Pick the unit you are converting from, such as Hertz (Hz) or Kilohertz (kHz).
  2. Type the value and every other unit updates as you type.
  3. Copy the figure you need, or use the swap button to reverse the direction, Radian per second (rad/s) included.

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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