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Wavelength / Frequency Converter

Convert wavelength to frequency for sound, light, and radio.

Frequency
440.00 Hz
Wavelength
779.55 mm

Reference frequencies

  • Concert A: 440 Hz
  • FM radio: 87.5–108 MHz
  • Wi-Fi: 2.4 GHz, 5 GHz, 6 GHz
  • Visible light: 405–790 THz
  • 5G mid: 3.5 GHz
  • Microwave oven: 2.45 GHz

Wave equation: v = f · λ. Frequency × wavelength = propagation speed. Light moves at ~300 million m/s in vacuum, sound in air at ~343 m/s. Wavelength in vacuum vs glass differs because the speed of light slows in any medium.

About

Pick a medium (light, sound in air, sound in water, radio). The tool uses v = f · λ to convert between frequency and wavelength. Auto-formats output across nm to km.

How to use

  1. Pick the medium.
  2. Type wavelength or frequency.

FAQ

Why does 2.4 GHz Wi-Fi reach so far?+

Lower-frequency radio waves diffract better around obstacles. 2.4 GHz penetrates walls more easily than 5 GHz. The tradeoff is bandwidth.