GHz to THz Converter
Convert gigahertz to terahertz instantly. 1 GHz = 0.001 THz, worked steps and a full reference table.
How to use it
- Type the value in gigahertz — the result updates as you type.
- Use Swap to flip the direction, or change either dropdown to convert between any two units.
- Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.
Examples
| 1 GHz | 0.001 THz |
| 5 GHz | 0.005 THz |
| 10 GHz | 0.01 THz |
| 100 GHz | 0.1 THz |
One gigahertz equals 0.001 terahertzes (THz). To convert gigahertzes to terahertzes, multiply by 0.001; to go back the other way, multiply by 1000 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 gigahertzes and terahertzes actually measure
Gigahertz (GHz) — A gigahertz is a billion hertz. Processor clocks, Wi-Fi bands and mobile networks.
Terahertz (THz) — A terahertz is a trillion hertz. Infrared and far-infrared spectroscopy.
GHz to THz conversion table
The most common values, worked out in advance. Anything not listed can be typed straight into the converter.
| GHz | THz |
|---|---|
| 1 GHz | 0.001 THz |
| 2 GHz | 0.002 THz |
| 5 GHz | 0.005 THz |
| 10 GHz | 0.01 THz |
| 25 GHz | 0.025 THz |
| 50 GHz | 0.05 THz |
| 100 GHz | 0.1 THz |
How to convert gigahertzes to terahertzes by hand
Multiply the number of gigahertzes by 0.001.
For example, 25 GHz × 0.001 = 0.025 THz.
Going the other way, divide by 0.001 — or multiply by 1000, 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.
Questions people ask
How many THz are in 1 GHz?
1 GHz equals exactly 0.001 THz. Multiply any value in gigahertz by 0.001 to get terahertz.
Is anything uploaded to a server?
No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.
Last updated 18 August 2026