kHz to Hz Converter

One kilohertz equals 1000 hertzes (Hz). To convert kilohertzes to hertzes, multiply by 1000; to go back the other way, multiply by 0.001 instead.

The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.

What kilohertzes and hertzes actually measure

Kilohertz (kHz) — A kilohertz is a thousand hertz. Audio sampling and AM radio.

Hertz (Hz) — The hertz is one cycle per second. Mains supply, audio pitch and refresh rates.

kHz to Hz conversion table

The most common values, worked out in advance. Anything not listed can be typed straight into the converter.

How to convert kilohertzes to hertzes by hand

Multiply the number of kilohertzes by 1000.

For example, 25 kHz × 1000 = 25000 Hz.

Going the other way, divide by 1000 — or multiply by 0.001, which is the same thing and easier to do in your head.

Everything runs in your browser

There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.