Frequency Converter
Convert a frequency between hertz, kHz, MHz, GHz and rpm - useful for audio, radio bands, processor clocks and spinning machinery.
About the Frequency Converter
This tool converts a frequency between hertz, kilohertz, megahertz, gigahertz and revolutions per minute (rpm). Frequency counts how many cycles happen per unit of time, so it describes audio tones, radio bands, processor clocks and spinning machinery.
How to use it
- Enter the value you know into its field, such as a radio frequency in MHz.
- Read the equivalent in kHz, GHz or plain Hz.
- Switch to the rpm field when working with engine or fan rotation speeds.
One hertz is one cycle per second, and the SI prefixes step up in factors of 1000: 1 kHz is 1000 Hz, 1 MHz is one million Hz and 1 GHz is one billion Hz. The rpm conversion links rotation to frequency, since 1 Hz equals 60 rpm (one rotation per second is 60 per minute). This is useful for comparing a motor's rpm to its rotational frequency in Hz. The converter runs entirely in your browser and stores nothing you enter.
Frequently asked questions
How many hertz are in a megahertz?
One megahertz equals 1,000,000 hertz. A kilohertz is 1000 Hz and a gigahertz is 1,000,000,000 Hz, each prefix stepping up by a factor of 1000.
How do I convert hertz to rpm?
Multiply hertz by 60, because there are 60 seconds in a minute. So 50 Hz equals 3000 rpm, and 1 Hz equals 60 rpm.
How do I convert MHz to GHz?
Divide megahertz by 1000. A 2400 MHz signal is 2.4 GHz, a common Wi-Fi band.
What does frequency actually measure?
Frequency measures how many cycles or events occur per second. One hertz is one cycle per second, whether that is a sound wave, a radio wave or a clock tick.