🌊Wave Calculator
Solve v = fλ and T = 1/f for any missing quantity, with unit conversion and a live wave animation.
Free Wave Calculator
Trying to relate wave speed, frequency, and wavelength? Our free Wave Calculator solves the wave equation v = fλ instantly. Enter any two of wave speed, frequency, wavelength, or period, and it calculates the rest — with the formula and substitution shown clearly.
Built-in presets for the speed of sound in air and the speed of light in vacuum make it quick to work through common physics problems without looking up constants. A live animated wave visualization shows how your wavelength and frequency relate, making the concept easier to picture, not just calculate.
Whether you're studying waves and sound for a physics class or checking a quick calculation, this tool gives accurate answers with clear reasoning. No sign-up, no downloads, no limits. See the About page or the FAQ for more.
About the Wave Calculator
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.
Frequently Asked Questions
How does the wave calculator work?
Enter any two of wave speed, frequency, wavelength, or period, and it solves for the rest using v = fλ and T = 1/f.
Is it free?
Completely free, no sign-up, downloads, or limits.
What is the wave equation?
Wave speed equals frequency multiplied by wavelength (v = fλ), linking how fast a wave travels to how often it oscillates and how long each cycle is.
Does it include speed of sound and light presets?
Yes, you can select the speed of sound in air or the speed of light in vacuum as a starting value.
Does it show the steps?
Yes, the formula and substitution with your actual values are shown for every calculation.
Does it work for both sound and light waves?
Yes, the wave equation applies to any wave type; just enter the relevant speed for your medium.
What if I enter a negative frequency?
Frequency, wavelength, and period must be positive; invalid values are flagged.
Does it show a visual of the wave?
Yes, an animated wave diagram updates live to reflect your entered wavelength and frequency.
Is my data stored?
No; everything runs in your browser and isn't stored or sent anywhere.
Does it work on mobile?
Yes, fully responsive, with the wave animation scaling to fit the screen.