How it works
λ = v / f
Wavelength (λ) is the distance between successive wave peaks.
Frequency (f) is how many cycles pass a point per second.
Speed (v) is how fast the wave travels. For light in vacuum, v = 299,792,458 m/s. For sound in air at 20°C, v = 343 m/s.
Enter any two values and the third will be calculated automatically.