About the Wave Calculator
Solve v = fλ and T = 1/f for wave speed, frequency, wavelength, or period.
What it is
Every wave — sound, light, water, radio — relates its speed, frequency, and wavelength through the same simple equation: v = fλ. This tool solves that equation (and its companion T = 1/f) for whichever quantity you're missing, working across unit systems so you don't have to convert by hand first.
Features
Solve for v, f, λ, or T
Enter any two known quantities and the calculator finds the rest.
Sound & light presets
One click loads the speed of sound in air or the speed of light in vacuum.
Unit conversion
Wavelength in m/cm/nm, frequency in Hz through GHz, speed in m/s or km/s, period in s or ms.
Animated wave visualization
A live canvas sine wave reflects your entered wavelength and frequency at a relative scale.