Frequency Converter

Convert Hz, kHz, MHz, GHz and RPM, with the period in milliseconds.

Frequency Converter

Worked example result

Converted frequency	3,600.000000
Period of one cycle	16.6667 ms
Summary	60 Hz = 3600 RPM

60 Hz is 3600 RPM — and each cycle lasts 16.67 ms, which is why 60 Hz lighting flicker is hard to see.

Convert frequency through the hertz (cycles per second): kilo-, mega- and gigahertz step by 1000, while RPM and cycles per minute step by 60 — 60 Hz is 3600 RPM. The period output shows how long one cycle takes: period = 1 ÷ frequency, so 50 Hz mains has a 20 ms period.

Everyday anchors: mains electricity is 50 or 60 Hz, concert A is 440 Hz, FM radio sits around 100 MHz, and Wi-Fi runs at 2.4 and 5 GHz.

The formula

Result = Value × (factor of from-unit in Hz) ÷ (factor of to-unit in Hz); Period (ms) = 1000 ÷ frequency in Hz

Worked example

60 Hz is 3600 RPM — and each cycle lasts 16.67 ms, which is why 60 Hz lighting flicker is hard to see.

The example is pre-loaded in the result panel — press Calculate with your own numbers to replace it.

Frequently asked questions

How do I convert RPM to Hz?

Divide by 60: a motor spinning at 1800 RPM rotates at 30 Hz. To go from Hz to RPM, multiply by 60.

What is the period of 440 Hz?

1 ÷ 440 ≈ 2.27 ms. The period output shows this for any frequency you convert.

Are cycles per minute and RPM the same?

Numerically yes — both count events per minute. RPM is used for rotating machinery; cycles per minute is the generic term.

Category: Unit Conversions calculators

Frequency Converter