Frequency Converter

Converts frequency across Hz, kHz, MHz, GHz and rpm. Hertz is cycles per second; rpm is revolutions per minute, so 1 Hz is 60 rpm — the bridge between electronics habits and mechanical ones.

How to use

1. Enter the frequency in the unit you have.
2. Read the equivalents, including the rpm bridge for rotating things.
3. Period is the reciprocal: 50 Hz means 20 ms per cycle.
4. Audio, radio and clocks each live in their own prefix range — see below.

When you actually need this

• Converting an engine or motor's rpm into Hz for a controller or analysis.
• Reading radio and Wi-Fi bands — 2.4 GHz, 5 GHz — against MHz equipment specs.
• Placing an audio frequency: the 20 Hz–20 kHz hearing range, 440 Hz concert pitch.
• Working out a signal's period from its frequency.

One unit, very different worlds

The same hertz spans absurd ranges: mains power at 50 or 60 Hz, audible sound from 20 Hz to 20 kHz, FM radio near 100 MHz, Wi-Fi at 2.4 and 5 GHz, CPU clocks in gigahertz. The prefixes here are decimal — a kilohertz is exactly 1,000 Hz, unlike the 1,024 of data sizes. The rpm bridge matters wherever electronics meet machines: a two-pole motor on 60 Hz mains turns at 3,600 rpm synchronous, and vibration analysis quotes shaft speed in rpm but spectra in Hz. Watch the factor of 60 — it is the commonest slip in these conversions.

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FAQ

How precise are the conversion factors in Frequency Converter?

The factors are the internationally defined exact values — one inch is exactly 25.4 millimetres, one pound is exactly 0.45359237 kilograms, and so on. Results are computed at full floating-point precision and only rounded for display.

Can I convert between metric and imperial units in both directions?

Yes. Enter a value in any field and every other unit updates at once, so the conversion works in either direction without switching modes or pressing a button.

Why does the last decimal place sometimes look off?

Because many conversions are irrational in decimal form and browsers use binary floating point, the final digit can differ by a tiny amount. The displayed value is rounded sensibly for everyday use; for laboratory or engineering work, carry the unrounded figure through your own calculation.