Half-Life Decay Calculator
Solve first-order exponential decay from initial amount, remaining amount, half-life, or elapsed time with a step schedule.
Decay result
Enter three values
First-order exponential decay.
| Step | Elapsed | Remaining | Percent |
|---|
N(t) = N0 * (1 / 2)^(t / h); lambda = ln(2) / h
How?
How this is calculated
The solver uses first-order exponential decay with a constant half-life. The schedule lists whole half-life steps from the solved initial amount.
Formula: N(t) = N0 * (1 / 2)^(t / h); lambda = ln(2) / h
Sources
- OpenStax College Physics 2e, Half-Life and Activity. OpenStax. Retrieved .
- Wikipedia, Half-life. Wikipedia. Retrieved .
- Wikipedia, Exponential decay. Wikipedia. Retrieved .
Method last reviewed