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Half-Life Calculator
Half-Life Calculator
Radioactive decay — find remaining quantity, elapsed time, or half-life t½
N(t) = N₀ × (½)t / t½
Please fill in all required fields.
Enter values and hit Calculate
to see the decay curve & results.
Remaining Quantity
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Decay Constant (λ)
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Mean Lifetime (τ)
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Amount Decayed
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% Remaining
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Step-by-Step
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