Half-Life Calculator

Radioactive decay calculator using N(t) = N₀ × (1/2)t/t½

Solve for

N(t) = N₀ × (1/2)t / t½

Results

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Remaining Amount
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Initial Amount
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Time Elapsed
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Half-Life
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Decay Constant (λ)
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Half-Lives Elapsed

Decay Curve

Common Isotopes