Convert Gigahertz to Terahertz (GHz to THz)
1 gigahertz (GHz) = 0.001 terahertz (THz). 1 THz = 1000 GHz. Example: 15 GHz = 15 × 0.001 = 0.015 THz.
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1 GHz = 0.001 THz
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigahertz to terahertz converter to paste a column from Excel.
How to Convert Gigahertz to Terahertz
- 1 GHz = 0.001 THz
- 1 THz = 1000 GHz
- Example: convert 15 GHz to THz: 15 GHz = 15 × 0.001 THz = 0.015 THz
Formula
THz = GHz ÷ 1000
Derivation from SI units:
- 1 GHz = 10⁹ Hz.
- 1 THz = 10¹² Hz.
- 1 GHz = 1000000000 Hz ÷ 1000000000000 Hz per THz = 0.001 THz
Both units are defined exactly, so the factor is exact. Gigahertz definition: gigahertz; Terahertz definition: terahertz.
Worked examples
- A reading of 3.5 GHz converts to 0.0035 THz.
3.5 GHz × 0.001 = 0.0035 THz - A value of 5.8 GHz is 0.0058 THz.
5.8 GHz × 0.001 = 0.0058 THz
Gigahertz to Terahertz conversion table
| Gigahertz (GHz) | Terahertz (THz) |
|---|---|
| 1 GHz | 0.001 THz |
| 2.4 GHz | 0.0024 THz |
| 3 GHz | 0.003 THz |
| 3.5 GHz | 0.0035 THz |
| 4 GHz | 0.004 THz |
| 5 GHz | 0.005 THz |
| 5.8 GHz | 0.0058 THz |
| 6 GHz | 0.006 THz |
| 28 GHz | 0.028 THz |
| 60 GHz | 0.06 THz |
Where it's used
Gigahertz are used for CPU and GPU clock speeds, while terahertz appear in optical communications. Both measure frequency and rotational speed, so the conversion is a fixed factor.
Gigahertz to other frequency units
| Conversion | 1 GHz equals |
|---|---|
| gigahertz to terahertz | 0.001 THz |
| gigahertz to hertz | 1000000000 Hz |
| gigahertz to megahertz | 1000 MHz |
| gigahertz to revolution per minute | 60000000000 rpm |
| gigahertz to kilohertz | 1000000 kHz |
| gigahertz to radian per second | 6283185307 rad/s |
| gigahertz to revolution per second | 1000000000 rps |
| gigahertz to degree per second | 360000000000 °/s |
Show 1 more units
| gigahertz to beat per minute | 60000000000 bpm |
|---|
Frequently asked questions
How many terahertz are in 1 gigahertz?
1 GHz = 0.001 THz.
How do I convert gigahertz to terahertz?
Multiply the value in GHz by 0.001, or divide it by 1000. For example, 15 GHz × 0.001 = 0.015 THz.
Is the GHz to THz conversion exact?
Yes. Both units are defined exactly, and 1 GHz is exactly 0.001 THz.
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 Gigahertz to Terahertz (GHz to THz). Retrieved October 25, 2026, from https://scientificconverters.com/frequency/gigahertz-to-terahertz/
IEEE
Scientific Converters, "Convert Gigahertz to Terahertz (GHz to THz)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/frequency/gigahertz-to-terahertz/