Wavelength & Frequency Calculator

Convert between wavelength and frequency. Calculate photon energy and identify the electromagnetic spectrum band.

Convert From

Value

Unit

Wavelength

12.49 cm

Frequency

2.4 GHz

Photon Energy (J)

1.590e-24

Energy (eV)

9.927e-6

EM Spectrum Band

Microwave

How to Use This Calculator

Select conversion direction: frequency to wavelength or wavelength to frequency.
Enter the known value and select the appropriate unit (Hz, kHz, MHz, GHz or nm, um, mm, m).
Review the calculated wavelength or frequency and the corresponding photon energy.
Use the energy in eV to classify the radiation type (radio, microwave, infrared, visible, UV, X-ray).
Remember: wavelength = c / frequency, where c = 3e8 m/s in vacuum.

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Formula

c = λf, E = hf

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