Terahertz (THz)
One trillion hertz. Visible light is roughly 400 to 790 THz.
What is a terahertz?
- Symbol
- THz
- Quantity
- Frequency & Wavelength
- Unit system
- SI
- Definition
- One trillion hertz. Visible light is roughly 400 to 790 THz.
- Exact
- Yes, the value is exact by definition
- Source
- SI Brochure, 9th edition (BIPM, 2019)
Common applications
Used for infrared and visible light frequencies, terahertz imaging and fiber-optic communication channels.
Terahertz in other frequency & wavelength units
- 1 THz = 1000000000000 HzHertz
- 1 THz = 1000000000 kHzKilohertz
- 1 THz = 1000000 MHzMegahertz
- 1 THz = 1000 GHzGigahertz
- 1 THz = 2.99792458e-7 λ kmWavelength in kilometers
- 1 THz = 0.000299792458 λ mWavelength in meters
- 1 THz = 0.0299792458 λ cmWavelength in centimeters
- 1 THz = 0.299792458 λ mmWavelength in millimeters
- 1 THz = 299.792458 λ µmWavelength in micrometers
- 1 THz = 299792.458 λ nmTerahertz to Wavelength in nanometers converter
Terahertz quick reference
| Terahertz | Wavelength in nanometers | Megahertz | Wavelength in meters |
|---|---|---|---|
| 1 THz | = 299792.458 λ nm | = 1000000 MHz | = 0.000299792458 λ m |
| 10 THz | = 29979.2458 λ nm | = 10000000 MHz | = 0.0000299792458 λ m |
| 100 THz | = 2997.92458 λ nm | = 100000000 MHz | = 0.00000299792458 λ m |
| 1000 THz | = 299.792458 λ nm | = 1000000000 MHz | = 2.99792458e-7 λ m |
Where the terahertz fits
The next smaller frequency & wavelength unit is the millimeter of wavelength (λ mm). 1 THz = 0.299792458 λ mm, and 1 λ mm = 0.299792458 THz.
The next larger frequency & wavelength unit is the micrometer of wavelength (λ µm). 1 THz = 299.792458 λ µm, and 1 λ µm = 299.792458 THz.
Frequently asked questions
- How many nanometers of wavelength are in one terahertz?
- One terahertz = 299792.458 λ nm (nanometers of wavelength).
- How many megahertz are in one terahertz?
- One terahertz = 1000000 MHz (megahertz).
- How many meters of wavelength are in one terahertz?
- One terahertz = 0.000299792458 λ m (meters of wavelength).