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Instant result
Enter the data and press the button to do the calculation.
Online Calculator
Electromagnetic wavelength calculator
Enter a frequency in Hz, kHz, MHz or GHz to get the ideal wavelength.
Uses the speed of light in a vacuum. In materials, propagation speed may be lower.
Information
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Local processing
The values are processed directly in your browser.
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Free
No registration, external API or subscription required.
Frequently asked questions
What's the formula?
λ = c/f.
What value do you use for c?
299,792,458 m/s, the speed of light in a vacuum.
Does it work the same inside a cable or material?
Not necessarily. The propagation speed is usually lower in a material medium.
What units does it show?
Meters, centimeters and feet.