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Calculation Machine

Wavelength Frequency Calculator

Convert between wavelength, frequency and wave speed.

Reviewed by the Calculation Machine team · How we check our maths

Your values

ⓘ Live results

Results
Wavelength
0.6236 m
Wavelength
62.36 cm
Period
0.00182 s

Quick answer

Wave speed = wavelength x frequency (v = lambda f).

The formula

v = lambda f

Worked example

Worked example

Using the values the calculator loads with.

Inputs

  • Frequency550 Hz
  • Wave speed343 m/s

Result

  • Wavelength0.6236 m
  • Wavelength62.36 cm
  • Period0.00182 s

How to use the Wavelength Frequency Calculator

  1. 1Enter the wave's frequency in hertz.
  2. 2Enter the wave speed (343 m/s for sound in air, ~3e8 m/s for light in vacuum).
  3. 3Read the wavelength and period.

Frequently asked questions

What speed do I use for light?

Use 299792458 m/s for light in a vacuum, or divide by the refractive index for a medium.

How is period related to frequency?

Period is the inverse of frequency: T = 1/f.

About this calculator