Convert Terahertz to Hertz (THz to Hz)
1 terahertz (THz) = 1000000000000 hertz (Hz). 1 Hz = 1 × 10⁻¹² THz. Example: 15 THz = 15 × 1000000000000 = 15000000000000 Hz.
Also searched as terahertz to Hz, terahertz in Hz, terahertz into hertz, THz to Hz, THz in hertz, THz into hertz, terahertz to hertz, THz to hertz converter and how many hertz in a terahertz.
1 THz = 1000000000000 Hz
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk terahertz to hertz converter to paste a column from Excel.
How to Convert Terahertz to Hertz
- 1 THz = 1000000000000 Hz
- 1 Hz = 1 × 10⁻¹² THz
- Example: convert 15 THz to Hz: 15 THz = 15 × 1000000000000 Hz = 15000000000000 Hz
Formula
Hz = THz × 1000000000000
Derivation from SI units:
- 1 THz = 10¹² Hz.
- 1 Hz = 1 s⁻¹, one cycle per second.
Both units are defined exactly, so the factor is exact. Terahertz definition: terahertz; Hertz definition: hertz.
Worked examples
- A reading of 1 THz converts to 1000000000000 Hz.
1 THz × 1000000000000 = 1000000000000 Hz - A value of 193.4 THz is 193400000000000 Hz.
193.4 THz × 1000000000000 = 193400000000000 Hz
Terahertz to Hertz conversion table
| Terahertz (THz) | Hertz (Hz) |
|---|---|
| 0.1 THz | 100000000000 Hz |
| 0.3 THz | 300000000000 Hz |
| 1 THz | 1000000000000 Hz |
| 3 THz | 3000000000000 Hz |
| 10 THz | 10000000000000 Hz |
| 193.4 THz | 193400000000000 Hz |
| 400 THz | 400000000000000 Hz |
| 750 THz | 750000000000000 Hz |
Where it's used
Terahertz are used for optical communications, while hertz appear in mains power (50/60 Hz). Both measure frequency and rotational speed, so the conversion is a fixed factor.
Terahertz to other frequency units
| Conversion | 1 THz equals |
|---|---|
| terahertz to hertz | 1000000000000 Hz |
| terahertz to megahertz | 1000000 MHz |
| terahertz to gigahertz | 1000 GHz |
| 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 hertz are in 1 terahertz?
1 THz = 1000000000000 Hz.
How do I convert terahertz to hertz?
Multiply the value in THz by 1000000000000. For example, 15 THz × 1000000000000 = 15000000000000 Hz.
Is the THz to Hz conversion exact?
Yes. Both units are defined exactly, and 1 THz is exactly 1000000000000 Hz.
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 Hertz (THz to Hz). Retrieved October 25, 2026, from https://scientificconverters.com/frequency/terahertz-to-hertz/
IEEE
Scientific Converters, "Convert Terahertz to Hertz (THz to Hz)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/frequency/terahertz-to-hertz/