Frequency ↔ Wavelength converter
Wavelength and frequency are inversely related through the speed of light (c = λf), so doubling one halves the other.
Converter
Quick pairs
tap to loadOne nanometer (wavelength) in every frequency ↔ wavelength unit
11 rows| Unit | Symbol | 1 nm equals |
|---|---|---|
| Hertz | Hz | 2.997925e17 |
| Kilohertz | kHz | 2.99792458e14 |
| Megahertz | MHz | 2.99792458e11 |
| Gigahertz | GHz | 299,792,458 |
| Terahertz | THz | 299,792.458 |
| Meter (wavelength) | m | 1e-9 |
| Centimeter (wavelength) | cm | 1e-7 |
| Millimeter (wavelength) | mm | 1e-6 |
| Micrometer (wavelength) | µm | 0.001 |
| Angstrom (wavelength) | Å | 10 |
| Electronvolt (photon energy) | eV | 1,239.841984 |
How the nanometer (wavelength) to terahertz conversion works
Green light near 550 nm sits around 545 THz.
Frequency ↔ Wavelength pairs an amount with a distance, and the two families are reciprocals of each other, so converting means dividing rather than multiplying. One useful anchor: 1 nm works out at 299,792.458 THz.
Questions
How many terahertz are in one nanometer (wavelength)?
One nanometer (wavelength) equals 299,792.458 terahertz.
Which units does this frequency ↔ wavelength converter cover?
12 units in total, all referenced to the hertz. They include hertz, kilohertz, megahertz, gigahertz, terahertz, meter (wavelength) and more. Pick any pair from the two dropdown lists.
How precise are the results?
Every conversion is computed in your browser at double precision from the factors listed on this page, which follow the SI definitions and the exact international agreements for imperial and US customary units. Use the Decimals control to round the display without changing the underlying value.
Does anything I type leave my device?
No. The converter is plain JavaScript running locally, with no server round-trip, and the page keeps working offline once loaded.