Nuclear calculators that show their work.
Start with the question you actually have. Each calculator exposes the inputs and assumptions that materially change the result instead of hiding them behind a score.
Reactor output calculator
Convert MWe and capacity factor into annual GWh and a household-energy equivalent.
FISSIONU-235 energy calculator
Estimate idealized fission energy from a U-235 mass, fissioned fraction and thermal-to-electric efficiency.
DOSERadiation dose perspective
Convert microsieverts to mSv and compare with broad reference scales such as natural background, chest X-ray and chest CT.
Which calculator do you need?
These tools answer different questions; they are not interchangeable.
| If your question is… | Use this tool | Main inputs | You get |
|---|---|---|---|
| How much electricity does a reactor make in a year? | Reactor output calculator | MWe, capacity factor, household benchmark | GWh/year + household-energy equivalent |
| What is the idealized fission-energy scale of a U-235 mass? | U-235 energy calculator | U-235 mass, fissioned fraction, conversion efficiency | Thermal GWh + electrical GWh/TWh |
| How large is a radiation dose in familiar units? | Radiation dose perspective | Dose in µSv | mSv + broad reference comparisons |
Know what the number means — and what it does not.
300 MWe at 92%
≈2,417.8 GWh/year. Change the capacity factor and household benchmark in the live calculator.
Open example →No hidden score
Every calculator exposes the inputs that materially change the result, and the methodology page documents the formulas.
Read methodology →Scale, not professional advice
The tools do not replace engineering, licensing, medical or radiation-safety analysis.
Read use limits →