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SESK: Stuff Everyone Should Know · sesk.info/ham-kilohertz-abbreviation

What is the abbreviation for kilohertz?

kHz.

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  1. khz
  2. kHz ✔
  3. KHz

Why: The standard abbreviation for kilohertz is kHz. The lowercase k means kilo, while Hz honors Heinrich Hertz.

Huh, didn't know that: Capitalization matters because mHz means millihertz, not megahertz.

The dad joke
Why does the k in kHz stay lowercase? It doesn't like to make a big deal of itself.
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References

Answer: kHz. The standard abbreviation for kilohertz is kHz. The lowercase k means kilo, while Hz honors Heinrich Hertz.

  1. HamStudy 2026 Technician pool, T5C06 hamstudy.org/browse/E2_2026/T5C
    The correct abbreviation is kHz.
    Checked 2026-10-09.

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