Nuclear Decay Calculator
Calculate radioactive decay using the exponential decay law
Common Radioactive Isotopes
Carbon-14: 5730 years
Uranium-238: 4.468e9 years
Radon-222: 3.82 days
Iodine-131: 8.02 days
Cobalt-60: 5.27 years
Technetium-99m: 6.01 hours
Formulas Used
N(t) = N₀ × (1/2)^(t/t_half) = N₀ × e^(-λt)
λ = ln(2) / t_half
Activity: A = λN
Mean lifetime: τ = 1/λ