Radioactive Decay Calculator
Model radioactive decay over time with the exponential decay formula. Generate a decay curve showing how a radioactive sample diminishes over multiple half-lives.
Inputs
Results
Remaining
250.00
% Remaining
25.00%
Half-Lives
2.00
Decay Curve
Radioactive Decay Results
| Parameter | Value |
|---|---|
| Initial Amount (N0) | 1,000 |
| Half-Life | 5,730 years |
| Time Elapsed | 11,460 years |
| Half-Lives Elapsed | 2.0000 |
| Remaining Amount | 250.0000 |
| Decayed Amount | 750.0000 |
| Percent Remaining | 25.0000% |
| Decay Constant (lambda) | 1.209681e-4 / years |
| Activity (lambda x N) | 3.0242e-2 / years |
| Mean Lifetime (1/lambda) | 8266.6426 years |