Half-Life Calculator
Remaining Quantity
Find Half-Life
Formula
N = N₀ × (½)^(t/t½) | λ = ln(2)/t½
Frequently Asked Questions
What is half-life?
Half-life is the time it takes for half of a substance to decay. After 1 half-life: 50% remains. After 2: 25%. After 3: 12.5%. The formula is N = N₀ × (½)^(t/t½). Carbon-14's half-life is 5,730 years.
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