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Frequency Converters

Convert between hertz, kilohertz, megahertz, gigahertz, terahertz, millihertz, microhertz, revolutions per second and other frequency units.

What this tool does

Convert between hertz, kilohertz, megahertz, gigahertz, terahertz, millihertz, microhertz, revolutions per second and other frequency units. Type an amount in hertz, choose the units, and the tool converts it to kilohertz. It offers 10 frequency units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one from 10 options, including Hertz, Kilohertz, Megahertz, Gigahertz, Terahertz, Millihertz. Starts as Hertz.
  • To: Choose one of the same 10 units as "From". Starts as Kilohertz.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from hertz to kilohertz:

  • 1 Hz = 0.001 kHz
  • 5 Hz = 0.005 kHz
  • 10 Hz = 0.01 kHz
  • 50 Hz = 0.05 kHz
  • 100 Hz = 0.1 kHz

Multiply the number of hertz by 0.001 to get kilohertz. Both units are exact definitions, so 0.001 is the exact factor: 1 Hz = 0.001 kHz.

Sources: Hertz: SI Brochure, 9th edition (2019). Kilohertz: SI Brochure, 9th edition (2019, updated 2022), Table 7 (SI prefixes).

Limitations

  • Converts the unit of a frequency only. It does not work out wavelength, period or photon energy.
  • One revolution is counted as one cycle, so one revolution per second equals one hertz and 1 Hz is 60 rpm.

FAQs

Q: What is a hertz?
A: A hertz is one cycle per second, the SI unit of frequency. Kilohertz, megahertz and the other prefixed units are powers of one thousand of it.
Q: Can I convert from kilohertz to hertz?
A: Yes. Choose kilohertz in the From box and hertz in the To box. Every unit can be the From or To unit.

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