Half-Life Formula
N(t) = N₀ × (1/2)^(t/t½)
λ = ln(2) / t½ ≈ 0.693 / t½
Half-Life Calculator
Calculate remaining quantity after radioactive or exponential decay.
Remaining Quantity
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0% remaining
Decayed
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Half-Lives Elapsed
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Decay Constant (λ)
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Mean Lifetime (τ)
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Decay Table
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