Radioactive Half-Life Calculator

Physics

Calculate remaining mass after N half-lives. Mass = Initial × (0.5)^N.

Formula

M = M₀ × (0.5)^n

100g, 3 half-lives

Inputs
  • Initial Mass (g): 100
  • Number of Half-Lives: 3

12.5g remains

Frequently asked questions

What is half-life?
Time for half of radioactive material to decay