Frequency Converter
Convert Hz, kHz, MHz, GHz and RPM, with the period in milliseconds.
Quick answer
- Formula: Result = Value × (factor of from-unit in Hz) ÷ (factor of to-unit in Hz); Period (ms) = 1000 ÷ frequency in Hz
- Worked example — Converted frequency: 3,600.000000 (full example below).
Frequency Converter
| 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
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
Sources & methodology
This calculator applies the formula shown on this page exactly as written, using the standard definitions for its inputs. Results are computed from the values you enter — no data is stored — and are rounded only for display.
Content last reviewed by CalcHub Editorial.
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