🌊 Wavelength Calculator
Calculate wavelength, frequency, and period
Enter any two values to calculate the third. Default velocity is the speed of light.
How Wavelength Calculation Works
Formula
λ = v / f; T = 1 / f
- 1Enter any two of: velocity, frequency, or wavelength.
- 2Default velocity is the speed of light (299,792,458 m/s).
- 3Wavelength = velocity / frequency.
- 4The period T (time for one cycle) = 1 / frequency.
- 5Results are displayed in scientific notation for very large or small values.
About Wavelength Calculator
Calculate wavelength, frequency, or wave velocity using λ = v/f. Default velocity is the speed of light. Also shows the wave period.
Frequently Asked Questions
What is wavelength?
Wavelength is the distance between two consecutive peaks (or troughs) of a wave. For light, visible wavelengths range from about 380 nm (violet) to 700 nm (red).
What is the relationship between frequency and wavelength?
Frequency and wavelength are inversely proportional: as frequency increases, wavelength decreases (and vice versa). Their product always equals the wave speed.
Why is the speed of light the default?
Electromagnetic waves (light, radio, microwaves) all travel at the speed of light in vacuum (~3×10⁸ m/s). For sound waves, change the velocity to ~343 m/s (speed of sound in air).