Wavelength and Frequency Calculator
Find wavelength from frequency or frequency from wavelength, for light, radio or sound.
–
Result
- Frequency
- Wavelength
- Photon energy
- Band
- Work
Saved Calculations
Items you add are saved in this browser.
| Name | Calculation | Result | Remove |
|---|
Wave Formulas
c = f × λ λ = c ÷ f f = c ÷ λ Photon energy E = h f
c = 299,792,458 m/s (exact) and h = 6.62607015 × 10⁻³⁴ J·s (exact since 2019). Values accept e-notation, like 500e-9 for 500 nm.
Worked Example
Tips
Light slows down in glass or water, which shortens its wavelength but not its frequency. Sound speed depends on temperature: about 331 + 0.6 × °C m/s in air.