Convert frequency measurements between hertz, kilohertz, megahertz, gigahertz and revolutions per minute (RPM).
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Result
0.001 kHz
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This tool converts between frequency units using fixed conversion factors, for example, 1 megahertz equals 1,000,000 hertz, and 1 hertz equals 60 revolutions per minute. Enter a value in any supported unit and it's converted to all others using these standard ratios.
Hertz and its multiples (kHz, MHz, GHz) measure cycles per second, used for everything from AC power and radio waves to computer processor clock speeds. RPM (revolutions per minute) is commonly used for rotational speed, such as engine, motor or hard drive spin rates, and converts directly to hertz since both describe repeating cycles.
Converting 3,000 RPM (a typical engine idle-to-cruise range) to hertz gives exactly 50 Hz (3,000 ÷ 60), since RPM measures cycles per minute and hertz measures cycles per second, a straightforward division by 60 bridges the two.
Forgetting that RPM and hertz measure cycles over different time windows, RPM is per minute, hertz is per second, skipping the ÷60 conversion produces a result 60 times too large.
Assuming kHz, MHz and GHz always refer to the same kind of frequency, both radio wave frequency and CPU clock speed use the same units, but they describe very different physical phenomena, don't assume comparability just because the units match.
Mixing up frequency (cycles per second) with wavelength (physical distance per cycle), the two are inversely related through the wave's speed, converting one to the other requires that additional speed value, which this tool doesn't handle.
Divide RPM by 60 to get hertz, since hertz measures cycles per second and RPM measures cycles per minute.
Household AC power runs at 60 Hz in the US and much of the Americas, and 50 Hz in Europe, Asia, Africa and most of the rest of the world.
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