Photon Energy (E = hf)
Calculate Photon Energy (E = hf) instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Photon Energy (E = hf)
λ, nm
E, eV
2.2545
More about: Photon Energy (E = hf)
What it calculates
The “Photon Energy (E = hf)” calculator computes E, eV from 1 parameter: λ, nm.
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters λ, nm = 550 the result is 2.25.
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.