The Frequency / Wavelength Calculator converts between frequency and wavelength for any propagation velocity. Enter any two of frequency, wavelength and velocity and the third is solved, with presets for the speed of light and the speed of sound.
Frequency / Wavelength Calculator
Convert between frequency and wavelength for light, sound or any custom velocity, with cable velocity factor support and quarter- and half-wave antenna lengths.
Medium
Cable
Enter frequency OR wavelength
Results
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frequency
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wavelength
Notes
About Frequency / Wavelength Calculator
Features
- Solves whichever value you leave blank
- Hz, kHz, MHz and GHz
- m, cm, mm and km
- Presets for light (299,792,458 m/s) and sound (343 m/s)
- Custom velocity for cables and other media
How to Use
- Enter any two of frequency, wavelength and velocity.
- Pick the units, and a velocity preset if needed.
- Read the solved third value.
Examples
Example: 100 MHz in free space -> a wavelength of 2.9979 m.
Benefits
- Antenna and cable-length work without manual unit juggling
- Custom velocity covers real media, not just vacuum
Frequently Asked Questions
What does this calculator do?
Convert between frequency and wavelength for light, sound or any custom velocity, with cable velocity factor support and quarter- and half-wave antenna lengths.
Is my data stored?
No. Everything runs in your browser; nothing is uploaded, saved or logged.