Frequency Converter

Convert between frequency units including hertz, kilohertz, megahertz, gigahertz, terahertz, radians per second, revolutions per minute, and revolutions per second.

Frequency Converter 9 units

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Common Frequency Conversions

All Frequency Conversions

Browse all unit combinations — each page has a dedicated converter and conversion table.

Millihertz → Hertz Millihertz → RPM Millihertz → RPS Millihertz → rad/s Millihertz → Kilohertz Millihertz → Megahertz Millihertz → Gigahertz Millihertz → Terahertz Hertz → Millihertz Hertz → RPM Hertz → RPS Hertz → rad/s Hertz → Kilohertz Hertz → Megahertz Hertz → Gigahertz Hertz → Terahertz RPM → Millihertz RPM → Hertz RPM → RPS RPM → rad/s RPM → Kilohertz RPM → Megahertz RPM → Gigahertz RPM → Terahertz RPS → Millihertz RPS → Hertz RPS → RPM RPS → rad/s RPS → Kilohertz RPS → Megahertz RPS → Gigahertz RPS → Terahertz rad/s → Millihertz rad/s → Hertz rad/s → RPM rad/s → RPS rad/s → Kilohertz rad/s → Megahertz rad/s → Gigahertz rad/s → Terahertz Kilohertz → Millihertz Kilohertz → Hertz Kilohertz → RPM Kilohertz → RPS Kilohertz → rad/s Kilohertz → Megahertz Kilohertz → Gigahertz Kilohertz → Terahertz Megahertz → Millihertz Megahertz → Hertz Megahertz → RPM Megahertz → RPS Megahertz → rad/s Megahertz → Kilohertz Megahertz → Gigahertz Megahertz → Terahertz Gigahertz → Millihertz Gigahertz → Hertz Gigahertz → RPM Gigahertz → RPS Gigahertz → rad/s Gigahertz → Kilohertz Gigahertz → Megahertz Gigahertz → Terahertz Terahertz → Millihertz Terahertz → Hertz Terahertz → RPM Terahertz → RPS Terahertz → rad/s Terahertz → Kilohertz Terahertz → Megahertz Terahertz → Gigahertz

📐 How to Use

Pick the frequency unit you have in the From dropdown, such as MHz, and the unit you want in the To dropdown.
Type the frequency into the value input and watch the result line update, which spells out the source and target units in full.
Tap the swap arrows to reverse the direction of the conversion, and use Copy to lift the result out of the page.
Select a card from the Common Frequency Conversions grid for a ready-made pair, or follow an All Frequency Conversions link to a page listing a table of converted values.

❓ Frequently Asked Questions

QHow many Hz are in 1 kHz?

1 kHz is 1000 Hz. The prefixes here advance in exact thousands, so 1 MHz is 1000 kHz, 1 GHz is 1,000,000 kHz and 1 THz is 1000 GHz. None of the 1024-based scaling used for file sizes applies.

QWhat is 1 Hz in RPM?

The exact answer is 60 RPM, since one cycle per second repeats sixty times a minute. This converter displays 59.9988 because its RPM factor is stored as 0.016667 Hz, a six-decimal rounding of one sixtieth.

QWhy is 1 Hz not 1 rad/s?

Because radians per second counts angle swept rather than cycles completed, and a full cycle is 2π radians. One hertz therefore appears as 6.283183 rad/s. Signal processing uses the angular form; rotating machinery is usually quoted in hertz or RPM.

QAre RPS and hertz interchangeable?

Numerically yes, since both hold a factor of one, so 1 RPS converts straight to 1 Hz. The labels carry different meaning: revolutions per second describes something turning, while hertz covers any repeating event, including an electrical waveform.

ℹ️ About Frequency Conversion

Frequency counts how often something repeats, one hertz being one cycle per second. The complication is that not every rate in the list counts the same event. Hertz and revolutions per second both describe one repetition per second, but one is a cycle of any periodic signal and the other a full turn of a shaft. Radians per second measures angular frequency, which is 2π times larger for the same motion. RPM, the workshop standard, is the same count taken per minute, and radio prefixes step in strict thousands rather than the powers of two used for data.

Nine units are included and all pass through the hertz. Figures round to six decimals between one and ten and to four above that, eight below one, and a result under a ten-millionth is printed in exponential notation. The calculation is done by the browser, so results refresh without reloading the page.

📏 9 Supported Units

Millihertz (mHz), Hertz (Hz), RPM (rpm), RPS (rps), rad/s (rad/s), Kilohertz (kHz), Megahertz (MHz), Gigahertz (GHz), Terahertz (THz).