Popular frequency to wavelength conversions
- Terahertz to nanometersnm = 299,792.458 ÷ THz
- Nanometers to terahertzTHz = 299,792.458 ÷ nm
- Megahertz to metersm = 299.792458 ÷ MHz
- Meters to megahertzMHz = 299.792458 ÷ m
- Gigahertz to centimeterscm = 29.9792458 ÷ GHz
- Centimeters to gigahertzGHz = 29.9792458 ÷ cm
- Gigahertz to millimetersmm = 299.792458 ÷ GHz
- Millimeters to gigahertzGHz = 299.792458 ÷ mm
- Kilohertz to metersm = 299,792.458 ÷ kHz
- Meters to kilohertzkHz = 299,792.458 ÷ m
- Hertz to metersm = 299,792,458 ÷ Hz
- Meters to hertzHz = 299,792,458 ÷ m
- Electronvolts to nanometersnm = 1,239.841984 ÷ eV
- Nanometers to electronvoltseV = 1,239.841984 ÷ nm
- Terahertz to micrometersµm = 299.792458 ÷ THz
- Micrometers to terahertzTHz = 299.792458 ÷ µm
- Wavenumbers to micrometersµm = 10,000 ÷ cm⁻¹
- Micrometers to wavenumberscm⁻¹ = 10,000 ÷ µm
About frequency to wavelength units
For electromagnetic waves in a vacuum, wavelength and frequency are linked by λ = c / f, where c = 299,792,458 m/s exactly. Photon energy follows E = h·f. Because wavelength is inversely proportional to frequency, this is a reciprocal conversion, not a multiplication. In air or other media the wavelength is shorter by the refractive index.
Frequency to Wavelength unit reference
| Unit | Symbol | Value in Hz | System |
|---|---|---|---|
| Hertz | Hz | 1 Hz | SI |
| Kilohertz | kHz | 1,000 Hz | SI |
| Megahertz | MHz | 1,000,000 Hz | SI |
| Gigahertz | GHz | 1,000,000,000 Hz | SI |
| Terahertz | THz | 1,000,000,000,000 Hz | SI |
| Meter (wavelength) | m | 299,792,460 ÷ value | SI |
| Kilometer (wavelength) | km | 299,792.46 ÷ value | SI |
| Centimeter (wavelength) | cm | 29,979,246,000 ÷ value | SI |
| Millimeter (wavelength) | mm | 299,792,460,000 ÷ value | SI |
| Micrometer (wavelength) | µm | 299,792,460,000,000 ÷ value | SI |
| Nanometer (wavelength) | nm | 2.9979246×10¹⁷ ÷ value | SI |
| Ångström (wavelength) | Å | 2.9979246×10¹⁸ ÷ value | Other |
| Wavenumber (cm⁻¹) | cm⁻¹ | 29,979,246,000 Hz | Other |
| Electronvolt (photon energy) | eV | 241,798,920,000,000 Hz | Other |
Frequently asked questions
What is the SI unit of frequency to wavelength?
This converter uses the hertz (Hz) as its reference unit; every other unit is defined relative to it.
How many frequency to wavelength units can I convert?
14 units are supported here, across SI, Other systems. Every pair can be converted in both directions.
Does this frequency to wavelength converter work offline?
Yes. Once the page has loaded, every calculation runs locally in your browser — nothing is sent to a server.