Wavelength and Frequency Calculator
Convert between wavelength and frequency for light or sound. The result updates as you type, with the working underneath so you can check it.
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Result
Wavelength
2.99792 m
- Frequency entered in MHz.
Good to know: λ = v ÷ f
Please note: For study and planning. Check calculations independently before using results with chemicals, electricity, pressure or machinery, and follow safety data sheets, manufacturer instructions and local regulations.
About this tool
Formula
λ = v ÷ f
Questions people ask
What is the wavelength of FM 100 MHz radio?
About 3 metres, because light travels 299,792,458 m/s and 299,792,458 ÷ 100,000,000 ≈ 3.0 m.
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How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it.
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