Kinetic Energy Calculator
Energy of motion.
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Wavelength Calculator
Find wavelength from frequency and wave speed.
Wavelength
—
Meters.
| Frequency | — |
|---|---|
| Wave speed | — |
| — | |
| — |
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Enter your figures above to see the step-by-step working.
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How the Wavelength Calculator Works
Wavelength is the distance between wave peaks. It equals the wave’s speed divided by its frequency. For electromagnetic waves the speed is the speed of light, about 299,792,458 m/s, so a 100 MHz FM signal has a wavelength of about 3 meters. Higher frequency means shorter wavelength.
For sound, use the speed of sound (about 343 m/s in air) instead. Keep speed in meters per second and frequency in hertz, and the wavelength comes out in meters.
wavelength = wave speed ÷ frequency
Frequently Asked Questions
How do you calculate wavelength?
Divide the wave’s speed by its frequency. For light, use the speed of light; for sound, the speed of sound.
What is the speed of light?
About 299,792,458 meters per second in a vacuum — the speed used for radio, light and all electromagnetic waves.
Does higher frequency mean shorter wavelength?
Yes — they’re inversely related at a fixed speed. Double the frequency and the wavelength halves.
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