半衰期计算器

计算放射性衰变半衰期

Initial Quantity (N₀)

Half-Life (t½) — time units

Elapsed Time (t) — time units

Written by the EachTools Team

Last updated: January 2026

How Radioactive Half-Life Works

Half-life is the time it takes for half of a radioactive substance to decay. The remaining amount follows exponential decay.

N(t) = N₀ × (1/2)^(t/t½)
Where: N₀ = initial amount, t½ = half-life, t = elapsed time

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