How many RPM is 60 Hz?

60 Hz = 3,600 RPM (60 times 60). This is why electric motors designed for 60 Hz power spin at multiples of 3,600 RPM. 50 Hz regions use 3,000 RPM.

What is the audible frequency range?

Humans hear roughly 20 Hz to 20 kHz. Dog whistles go up to 40 kHz. Ultrasound medical imaging uses 2-18 MHz.

1 GHz = 1,000 MHz = 1,000,000 kHz = 1,000,000,000 Hz. Wi-Fi uses 2.4 GHz and 5 GHz bands; FM radio is 88-108 MHz.

Car engine idle at 800 RPM = 13.33 Hz. 50 Hz power grid = 3000 RPM. A4 piano = 440 Hz. Different industries measure frequency differently.

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Last updated September 10, 2026 — conversions use exact ISO unit definitions.