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Both calculators run independently — change the inputs on either side to compare results.
Nuclear
Critical Mass Calculator
Estimate the mass of a uniform-density fissile sphere given its known critical radius and material density. Useful for nuclear engineering coursework, criticality-safety analysis, and reactor physics demonstrations.
Fill in the required fields to see your result.
Nuclear
Nuclear Criticality Calculator
Compute the effective neutron multiplication factor (k_eff) for a fissile system using the six-factor formula. Used by nuclear engineers to determine whether a reactor or fissile assembly is subcritical, critical, or supercritical.
Fill in the required fields to see your result.
Key differences
| Critical Mass Calculator | Nuclear Criticality Calculator | |
|---|---|---|
| Category | Nuclear | Nuclear |
| Inputs required | 2 | 5 |
| Result | Critical Mass (g) | Multiplication Factor (k) |
| What it does | Estimate the mass of a uniform-density fissile sphere given its known critical radius and material density. Useful for nuclear engineering coursework, criticality-safety analysis, and reactor physics demonstrations. | Compute the effective neutron multiplication factor (k_eff) for a fissile system using the six-factor formula. Used by nuclear engineers to determine whether a reactor or fissile assembly is subcritical, critical, or supercritical. |