Wavelength and frequency are two ways of describing the same wave, and they are linked by the wave equation which says the wave speed equals the wavelength multiplied by the frequency. For light in a vacuum that speed is the speed of light, 299792458 meters per second, so a longer wavelength always means a lower frequency and the other way around. This converter takes either a wavelength in meters or a frequency in hertz and gives you the other, and it also reports the photon energy for electromagnetic waves. You can change the wave speed to model sound or waves in a medium. It is handy for optics, radio, spectroscopy and physics coursework. Enter one value and the conversion appears instantly, computed entirely in your browser.
Wave speed equals wavelength times frequency, written c equals lambda times f. For light in a vacuum the speed is about 3 times 10 to the 8 meters per second.
Yes. Set the wave speed to match your medium, for example the speed of sound, and it converts using that speed.
Wavelength is typically in meters and frequency in hertz, with wave speed in meters per second.
Wavelength and frequency are two ways of describing the same wave, and they are linked by the wave equation which says the wave speed equals the wavelength multiplied by the frequency. For light in a vacuum that speed is the speed of light, 299792458 meters per second, so a longer wavelength always means a lower frequency and the other way around.
Yes. Wavelength Frequency Converter is completely free, with no sign-up and no usage limits.
Yes. Wavelength Frequency Converter runs in any modern web browser. There is nothing to download or install.
Yes. Wavelength Frequency Converter runs entirely on your device in your browser, so nothing you enter is uploaded to a server.