How this calculator works
N = N₀(1/2)^(t/t½).
Formula
N=N₀(1/2)^(t/t½)Remaining amount after first-order half-life decay.
Worked example
Verified example is a verified test case used by the calculation engine.
Assumptions and limitations
- Half-life must be positive.
- Initial amount and elapsed time are non-negative.
- Half-life remains constant.
Methodology & sources
This calculator uses deterministic, versioned calculation logic. The formula and verified examples above are part of the calculation definition used by CalcuMint. Technical calculation version: 1.
- CalcuMint deterministic chemistry engine
Frequently asked questions
What happens after two half-lives?
One quarter of the initial amount remains.
Can elapsed time be zero?
Yes. The remaining amount then equals the initial amount.