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Frequency Converter

Convert any frequency unit to another with this free frequency converter. It supports 5 units including hertz, kilohertz, megahertz, gigahertz, revolutions per minute. Pick a conversion below for a dedicated calculator, formula, and reference table. For example, 1 Hz = 0.001 kHz.

All frequency conversions

Hertz → KilohertzHertz → MegahertzHertz → GigahertzHertz → Revolution per MinuteKilohertz → HertzKilohertz → MegahertzKilohertz → GigahertzKilohertz → Revolution per MinuteMegahertz → HertzMegahertz → KilohertzMegahertz → GigahertzMegahertz → Revolution per MinuteGigahertz → HertzGigahertz → KilohertzGigahertz → MegahertzGigahertz → Revolution per MinuteRevolution per Minute → HertzRevolution per Minute → KilohertzRevolution per Minute → MegahertzRevolution per Minute → Gigahertz

About these units

Hertz (Hz)

Definition
The hertz (Hz) is the SI unit of frequency, equal to one cycle or event per second.
History
Named after Heinrich Hertz, who demonstrated electromagnetic waves; adopted by the SI in 1960.
Current use
Hertz measures sound, alternating current, and wave frequencies everywhere.

Kilohertz (kHz)

Definition
A kilohertz (kHz) is 1,000 hertz.
History
It is a metric multiple of the hertz.
Current use
Kilohertz describe audio sampling and AM radio frequencies.

Megahertz (MHz)

Definition
A megahertz (MHz) is one million hertz.
History
It became common with radio and early computer processors.
Current use
Megahertz describe FM radio, Wi-Fi channels, and clock speeds.

Gigahertz (GHz)

Definition
A gigahertz (GHz) is one billion hertz.
History
Gigahertz frequencies arrived with modern processors and wireless networks.
Current use
Gigahertz rate CPU clock speeds and Wi-Fi, mobile, and radar bands.

Revolution per Minute (rpm)

Definition
Revolutions per minute (rpm) is a frequency unit counting full rotations each minute.
History
It developed with rotating machinery during the industrial age.
Current use
Rpm measures engine, motor, and hard-drive rotation speeds.

Frequently asked questions

What frequency units can I convert?

This frequency converter supports 5 units: hertz, kilohertz, megahertz, gigahertz, revolutions per minute. Select any pair below to open a dedicated converter with a formula and conversion table.

How accurate is the frequency converter?

Conversions use exact definitional factors, so results are accurate to the precision you need for science, engineering, and everyday use. Values are rounded only for display.

Is the frequency converter free?

Yes. Every frequency conversion is completely free, needs no sign-up, and runs entirely in your browser — your inputs never leave your device.

Free, private, and instant — every conversion runs in your browser.

Browse all conversions