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Wavelength & Frequency Calculator

Convert between wavelength and frequency for a given wave speed.

Convert between wavelength and frequency for a wave travelling at any speed (defaults to the speed of light in vacuum).

Daniel Oh By Daniel Oh
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Hz
m/s

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

v = f · λ. For light, v = c ≈ 2.998 × 10⁸ m/s.

In depth

Convert between wavelength and frequency for a wave travelling at any speed (defaults to the speed of light in vacuum).