Free Nuclear Fusion Energy Calculator
Calculate the energy released in a nuclear fusion reaction from the mass difference between reactants and products.
Energy Released
17.61 MeV
Energy Released vs Total Mass of Reactants
Nuclear Fusion Energy
Fusion of light nuclei releases energy because the products have higher binding energy per nucleon. The energy comes from the mass difference, just like fission.
Formula
E = delta_m × 931.494 MeV/u
The D-T fusion reaction (²H + ³H → ⁴He + n) releases 17.6 MeV. Per unit mass, fusion fuel releases about 4 times more energy than fission fuel, making it the ultimate energy source.
Example Calculation
D-T fusion: D(2.0141) + T(3.0164) → He-4(4.0026) + n(1.0087) + energy.
- 01Reactant mass = 2.0141 + 3.0164 = 5.0305 u
- 02Product mass = 4.0026 + 1.0087 = 5.0113 u
- 03delta_m = 5.0305 - 5.0116 = 0.0189 u
- 04E = 0.0189 × 931.494 = 17.6 MeV
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