Photon Energy Calculator
⚛ Modern physics. Use the Photon energy formula to find energy, frequency: pick the value you want, type the others, and the answer updates as you go.
Energy3.98 × 10⁻¹⁹ J
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Energy | J |
| Frequency | Hz |
Worked example
Find the energy when Frequency = 6 × 10¹⁴ Hz.
Using E = hf: Energy = 3.98 × 10⁻¹⁹ J.
Frequently asked questions
What is the formula for Photon energy?
E = hf.
What do the letters stand for, and what units are used?
Energy in J, Frequency in Hz.
How do you calculate energy?
Put the values into E = hf. For example, with Frequency = 6 × 10¹⁴ Hz, energy = 3.98 × 10⁻¹⁹ J.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (energy, frequency) and fill in the others: it rearranges the formula for you.
