Wavelength / Frequency Converter
Convert between wavelength and frequency for electromagnetic waves. Uses the constant c = 299,792,458 m/s (speed of light in vacuum). Enter a value in any wavelength or frequency unit and see all equivalents.
Common Wavelength / Frequency Conversions
| From | To |
|---|---|
| 1 GHz | ~0.299792458 m (29.98 cm) |
| 2.4 GHz | ~0.1249 m (12.5 cm, Wi-Fi band) |
| Visible light 500 nm | ~600 THz |
| C (radio) | ~1.0 m |
Wavelength / Frequency Unit Definitions
- Meter (m)
- SI unit of wavelength.
- Nanometer (nm)
- 10⁻⁹ m. Used for visible light and UV.
- Hertz (Hz)
- SI unit of frequency.
- Gigahertz (GHz)
- 10⁹ Hz. Used for radio, microwaves, Wi-Fi.
Frequently Asked Questions
How do you convert wavelength to frequency?
f = c / λ, where c = 299,792,458 m/s. Example: λ = 0.5 m → f ≈ 600 MHz.
Why can't you convert nm directly to Hz without c?
Wavelength and frequency are inversely proportional; the constant of proportionality is the wave speed.
What wavelength is visible light?
Visible light spans approximately 380 nm (violet) to 700 nm (red). Ultraviolet is below 380 nm; infrared is above 700 nm.