Half-Life Calculator
Remaining quantity after elapsed time, given a half-life.
e.g. 5,730 years for C-14
Result
Remaining25
% remaining25%
Half-lives elapsed2
Decay constant λ0.00012097
Half-Life Calculator — FAQs
What is half-life?
Time for half the quantity to decay. After n half-lives, (1/2)ⁿ remains — after 10, only ~0.1% is left.
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