Frequency to Wavelength Calculator
Convert frequency into wavelength using the speed of light and an adjustable propagation velocity factor.
Your result
Review your calculated values below.
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Choose Calculate to see your result.
How to use this calculator
- Enter your values in the labeled fields, keeping the displayed units.
- Choose Calculate or press Enter in a single-line field.
- Review the result and the assumptions below before using it.
Formula and method
Wavelength = 299,792,458 × velocity factor / frequency in Hz.
Worked example
At 100 MHz in free space, wavelength is 2.99792458 m, approximately 3 meters.
What the result assumes
A factor of 1 is free space. Transmission lines and other media may have a lower propagation speed; use the specified factor.
Common question
Is wavelength the same as an antenna’s physical length?
No. Antenna geometry, end effects, and materials affect the physical length needed for resonance.