Half-Life Calculator

Enter initial amount N₀, half-life T, and elapsed time t to compute the remaining amount using N = N₀ × (½)^(t/T).

Free to use

N = N₀ × (½)^(t/T)
Remaining amount
25
Percent remaining
25%
Half-lives elapsed
2

Made with MathPrepAI

Inputs

Common isotopes (prefill half-life T)