Half-Life Calculator

Calculate either initial quantity, final quantity, elapsed time, or half-life given the other three values. In a system of exponential decay, half-life is the time it takes for the quantity of a substance to decrease by one-half. Half-life can be calculated using the formula N(t) = N(0) / 2^t/h where N(t) is the quantity remaining at time t, N(0) is the initial quantity, and h is the half-life.

Calculate: Initial quantity Final quantity Elapsed time Half-life

Initial quantity:

Final quantity:

Elapsed time: seconds minutes hours days years

Half-life: seconds minutes hours days years
Calculate