Free Nuclear Fission Energy Calculator
Calculate the energy released per fission event from the mass difference between reactants and products.
Energy Released per Fission
207.82 MeV
Energy Released per Fission vs Total Mass of Reactants
Nuclear Fission Energy
Fission releases energy because the products have higher binding energy per nucleon than the parent nucleus. The energy comes from the mass difference between reactants and products.
Formula
E = delta_m × 931.494 MeV/u
A typical U-235 fission releases about 200 MeV, which is roughly 80 million times more energy per reaction than a typical chemical reaction (~2.5 eV for TNT).
Example Calculation
U-236 fissions: total reactant mass 236.0526 u, total product mass 235.8295 u.
- 01delta_m = 236.0526 - 235.8295 = 0.2231 u
- 02E = 0.2231 × 931.494 = 207.8 MeV
- 03E = 207.8 × 1.602 × 10⁻¹³ = 3.33 × 10⁻¹¹ J per fission
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