Half-Life Calculator
Half-Life Calculator
Calculate remaining amounts, half-life durations, or elapsed time.
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What is Half-Life?
In science, half-life is the time required for a quantity to reduce to half of its initial value. It is most commonly used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay, but it is also widely used in pharmacology to determine how long a drug stays active in the human body.
Half-Life Formula
The standard mathematical equation for calculating radioactive decay or biological half-life is:
Where:
$N(t)$ = Remaining amount after time $t$
$N_0$ = Initial amount
$t$ = Elapsed time
$h$ = Half-life duration