Frequency Converter
Convert between hertz, kilohertz, megahertz, gigahertz, rpm and beats per minute.
Processing: This tool runs entirely in your browser. Your input and any file you open stay on your device — nothing is uploaded to a server.
How to use the frequency converter
- Type the amount you want to convert.
- Choose the unit you have and the unit you want.
- Read the result, or use the table showing all 7 units at once.
About this tool
Hertz counts events per second, so the multiples are straightforward: a thousand hertz is a kilohertz, a million a megahertz.
The conversion worth understanding is to revolutions and beats per minute, because they measure the same thing on a different clock. One hertz is sixty per minute, so a motor turning at 3,000 rpm is running at exactly 50 Hz — which is why mains-driven motors in a 50 Hz country settle at multiples of 3,000 rpm and those in a 60 Hz country at multiples of 3,600.
Beats per minute in music is the same arithmetic. A 120 bpm track is 2 Hz.
Common uses
- Converting a processor or radio frequency between units.
- Relating motor speed in rpm to mains frequency.
- Turning a musical tempo into hertz.
Frequently asked questions
- How do I convert rpm to Hz?
- Divide by 60. A motor at 3,000 rpm runs at 50 Hz, which is why mains-driven motors settle at multiples of 3,000 or 3,600 depending on the country.
- Is bpm the same as Hz?
- Dimensionally yes — both count events per unit time. A 120 bpm tempo is 2 Hz.
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