Click save settings to reload page with unique web page address for bookmarking and sharing the current tool settings, or click flip tool to reverse the tool function with current settings

Switch tool with the current settings for photon energy (E) or frequency (f), and calculate wavelength (λ) or the the time taken (T) for an em wave to complete one cycle of oscillation instead

## Related Tools

- Frequency to energy calculation
- Wavelength to energy calculation
- Energy to wavelength calculation
- Wavelength to frequency calculation
- Frequency to wavelength calculation
- Frequency converter
- Energy converter

## User Guide

Calculate the frequency of an electromagnetic wave by entering a value for the corresponding energy per photon for the em wave.

Electromagnetic waves are divided up into regions of what is called the electromagnetic spectrum. Starting with the highest frequencies, the spectrum is made up of gamma rays, x rays, ultraviolet, visible light, infra-red, microwave, and radio waves. This energy per photon to frequency calculator can be used for all types of waves in the electromagnetic spectrum.

Enter the energy value per photon, along with selecting the relevant energy measurement units, and then select the required frequency measurement units to calculate the corresponding em wave frequency. The result will then be displayed in the answer box along with a dynamic conversion scale to show how frequency varies for different photon energies, above and below the entered value.

### Formula

The formula used to calculate the frequency of an electromagnetic wave is:

f = E / h

#### Symbols

- f = Frequency of EM wave
- E = Photon energy
- h = Planck constant

### Photon Energy

Enter the energy per photon for the electromagnetic wave. This is the energy possessed by a single photon, oscillating at the specified wave frequency, as it propagates through a medium at the speed of light.

### Frequency

This is the number of completed cycles of oscillation per unit of time, a photon generates as an electromagnetic wave, as it propagates through a medium at the speed of light.