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

## Related Tools

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

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 frequency to energy per photon calculator can be used for all types of waves in the electromagnetic spectrum.

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

### Formula

The formula used to calculate the energy per photon for an electromagnetic wave is:

E = h · f

#### Symbols

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

### Frequency

Enter the frequency of the electromagnetic wave. 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.

### Photon Energy

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.