Formula and method
Wavelength λ = wave speed/frequency. Period T = 1/frequency.
Worked example
At 100 MHz and the vacuum light speed of 299,792,458 m/s, wavelength is 2.99792458 m.
Wavelength Calculator
Find wavelength from speed and frequency, or solve for the frequency or the propagation speed, with the working shown.
Printed from Calxy · https://www.calxy.net/other/wavelength-calculator
Wavelength2.9979 m
m/s
0 – 1,000,000,000,000,000 m/s
Hz
0 – 1,000,000,000,000,000 Hz
Wavelength
2.9979 m
- Wave propagation speed299,792,458.0000 m/s
- Frequency100,000,000.0000 Hz
- Frequency period1 × 10⁻⁸ s
- Wavelength in nanometers2,997,924,580.0000 nm
The default speed is light in vacuum. Use the appropriate phase speed for sound or waves in a material; dispersion can make speed frequency-dependent.
How this was calculated
- λ = v ÷ fPut in your numbers: λ = 299,792,458 m/s ÷ 100,000,000 HzAnswer: λ = 2.99792458 m
- Period T = 1/f.
Frequently asked questions
Can I use this for sound?
Yes, if you enter the appropriate sound speed in the medium. The default is vacuum light speed and is not appropriate for sound.
References
- University Physics Volume 1, 16.2 Mathematics of Waves — OpenStax (Rice University)
Last updated . Results are estimates for informational purposes only.