Half-Life Calculator
Determine the effects of exponential decay and radioactive half-life.
Calculate Remaining Quantity
What is Half-Life?
Half-life (t₁/₂) is the time required for a quantity to reduce to half of its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay, but it can also be used to describe any type of exponential decay, such as the elimination of a drug from the body.