Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Nuclear
Nuclear Decay Calculator
Determine how much of a radioactive isotope remains after a given time using its half-life. Used in radiometric dating, medical isotope dosing, and nuclear waste management.
Fill in the required fields to see your result.
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.
Key differences
| Nuclear Decay Calculator | Critical Mass Calculator | |
|---|---|---|
| Category | Nuclear | Nuclear |
| Inputs required | 3 | 2 |
| Result | Remaining Quantity (atoms) | Critical Mass (g) |
| What it does | Determine how much of a radioactive isotope remains after a given time using its half-life. Used in radiometric dating, medical isotope dosing, and nuclear waste management. | 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. |