Fusion Energy Calculator
☢ Nuclear & Decay. Use the Fusion energy formula to find energy released, reactant mass, product mass: pick the value you want, type the others, and the answer updates as you go.
Default: deuterium + tritium → helium-4 + neutron.
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 released | MeV |
| Reactant mass | u |
| Product mass | u |
Worked example
Find the energy released when Reactant mass = 5.0302 u, Product mass = 5.0113 u.
Using Erelease = (mreactants - mproducts) c²: Energy released = 17.59 MeV.
Frequently asked questions
What is the formula for Fusion energy?
Erelease = (mreactants - mproducts) c². Default: deuterium + tritium → helium-4 + neutron.
What do the letters stand for, and what units are used?
Energy released in MeV, Reactant mass in u, Product mass in u.
How do you calculate energy released?
Put the values into Erelease = (mreactants - mproducts) c². For example, with Reactant mass = 5.0302 u, Product mass = 5.0113 u, energy released = 17.59 MeV.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (energy released, reactant mass, product mass) and fill in the others: it rearranges the formula for you.
