☢️ Half-Life Calculator

Calculate radioactive decay.

Initial Quantity

Half-Life

Elapsed Time

Use same units for half-life and elapsed time.

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Remaining

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% Remaining

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Decayed

N(t) = N₀ × 0.5^(t/t½)

Carbon-14 dating?

C-14 has a 5,730-year half-life. Used to date organic materials up to ~50,000 years old.