Frequency Converter
Convert hertz, kilohertz, megahertz, gigahertz and RPM.
Popular frequency conversions
Frequency unit reference chart
What one of each unit is worth in hertz, the base unit used for every conversion in this category.
| Unit | Symbol | 1 unit in Hz |
|---|---|---|
| hertz | Hz | 1 Hz |
| kilohertz | kHz | 1,000 Hz |
| megahertz | MHz | 1,000,000 Hz |
| gigahertz | GHz | 1,000,000,000 Hz |
| revolutions per minute | rpm | 0.01666666667 Hz |
| terahertz | THz | 1,000,000,000,000 Hz |
Frequency units explained
Hertz (Hz)
The hertz is the SI unit of frequency: one cycle per second.
Kilohertz (kHz)
A kilohertz is one thousand cycles per second. AM radio frequencies and audio sample rates are quoted in kilohertz.
Megahertz (MHz)
A megahertz is one million cycles per second. FM radio, memory bus speeds and older CPU clocks are measured in megahertz.
Gigahertz (GHz)
A gigahertz is one billion cycles per second — the unit used for CPU clock speeds and Wi-Fi bands.
Revolutions per minute (rpm)
Revolutions per minute measures rotational speed. 60 RPM equals exactly 1 Hz.
Frequently asked questions
What is the base unit of frequency?
This converter routes every frequency conversion through the hertz. Converting from one unit to another means converting to hertzs first and then out again, which keeps every pair consistent with every other pair.
How accurate are these frequency conversions?
Results are shown to 10 significant digits using exact defined factors wherever a unit has one. No rounding is applied beyond that final display step.
All frequency conversions
Every frequency conversion page on this site, 28 in total.