Convert Terahertz to Gigahertz (THz to GHz)
1 terahertz (THz) = 1000 gigahertz (GHz). 1 GHz = 0.001 THz. Example: 15 THz = 15 × 1000 = 15000 GHz.
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1 THz = 1000 GHz
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk terahertz to gigahertz converter to paste a column from Excel.
How to Convert Terahertz to Gigahertz
- 1 THz = 1000 GHz
- 1 GHz = 0.001 THz
- Example: convert 15 THz to GHz: 15 THz = 15 × 1000 GHz = 15000 GHz
Formula
GHz = THz × 1000
Derivation from SI units:
- 1 THz = 10¹² Hz.
- 1 GHz = 10⁹ Hz.
- 1 THz = 1000000000000 Hz ÷ 1000000000 Hz per GHz = 1000 GHz
Both units are defined exactly, so the factor is exact. Terahertz definition: terahertz; Gigahertz definition: gigahertz.
Worked examples
- A reading of 1 THz converts to 1000 GHz.
1 THz × 1000 = 1000 GHz - A value of 193.4 THz is 193400 GHz.
193.4 THz × 1000 = 193400 GHz
Terahertz to Gigahertz conversion table
| Terahertz (THz) | Gigahertz (GHz) |
|---|---|
| 0.1 THz | 100 GHz |
| 0.3 THz | 300 GHz |
| 1 THz | 1000 GHz |
| 3 THz | 3000 GHz |
| 10 THz | 10000 GHz |
| 193.4 THz | 193400 GHz |
| 400 THz | 400000 GHz |
| 750 THz | 750000 GHz |
Where it's used
Terahertz are used for optical communications, while gigahertz appear in CPU and GPU clock speeds. Both measure frequency and rotational speed, so the conversion is a fixed factor.
Terahertz to other frequency units
| Conversion | 1 THz equals |
|---|---|
| terahertz to gigahertz | 1000 GHz |
| terahertz to hertz | 1000000000000 Hz |
| terahertz to megahertz | 1000000 MHz |
| terahertz to revolution per minute | 60000000000000 rpm |
| terahertz to kilohertz | 1000000000 kHz |
| terahertz to radian per second | 6283185307000 rad/s |
| terahertz to revolution per second | 1000000000000 rps |
| terahertz to degree per second | 360000000000000 °/s |
Show 1 more units
| terahertz to beat per minute | 60000000000000 bpm |
|---|
Frequently asked questions
How many gigahertz are in 1 terahertz?
1 THz = 1000 GHz.
How do I convert terahertz to gigahertz?
Multiply the value in THz by 1000. For example, 15 THz × 1000 = 15000 GHz.
Is the THz to GHz conversion exact?
Yes. Both units are defined exactly, and 1 THz is exactly 1000 GHz.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Terahertz to Gigahertz (THz to GHz). Retrieved October 25, 2026, from https://scientificconverters.com/frequency/terahertz-to-gigahertz/
IEEE
Scientific Converters, "Convert Terahertz to Gigahertz (THz to GHz)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/frequency/terahertz-to-gigahertz/