Wavelength Frequency Calculator
Solve c = f lambda. Default wave speed is 299792458 m/s, the speed of light in vacuum. Enter frequency or wavelength. Informational, not a radio license or wiring approval.
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How to convert wavelength and frequency
- Enter frequency in hertz, or leave it blank if you will enter wavelength.
- Enter wavelength in meters only when you want to solve frequency, or leave it blank.
- Keep c at 299792458 for light, or type a different speed such as sound in air.
- Read frequency, wavelength, and speed. The relation is c = f lambda. Nothing is uploaded.
Wavelength and frequency
c = f lambda
| c | Wave speed. Default 299792458 m/s (speed of light in vacuum). |
|---|---|
| f | Frequency in hertz |
| lambda | Wavelength in meters |
| Light default | f = c gives lambda = 1 m |
| Sound | Replace c with the speed of sound in that medium |
| Related converter | Hertz and RPM live on the frequency converter |
What c = f lambda means
Wave speed equals frequency times wavelength. In vacuum for light, c is 299792458 m/s. The default frequency equals that c, so wavelength is 1 m. Leave frequency blank and type lambda to solve f = c / lambda.
Hertz, meters, and wave speed
Hertz is cycles per second. Wavelength is the distance between repeats. c is not always light: water waves and sound use other speeds. This page does not convert RPM by itself. Use the frequency converter for hertz and RPM.
How this page solves
Enter frequency, or wavelength, or both. If both are present, wavelength is recomputed as c / f. Speed must be greater than 0. The arithmetic stays in this tab.
Limits
No medium, no refractive index, no antenna design. Informational, not a radio license or wiring approval. CZNull does not receive the values. See the disclaimer.