// multi-utility computation suite · offline · instant · precise
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│ computation suite │
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unit.radioactive-half-life Calculator
Converts radioactive half-life between time units and calculates remaining activity at a given elapsed time. Every log-2 increase in elapsed half-lives reduces activity by 50% — this shows the decay profile for isotope handling decisions.
Inputs
Amount
Reference formula or conversion factor shown for context.
Half Life
Reference formula or conversion factor shown for context.
Time
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Results
remaining amount
Sample size or count used in the calculation.
% remaining
Sample size or count used in the calculation.
decay constant λ
Sample size or count used in the calculation.
half-lives elapsed
Reference formula or conversion factor shown for context.
A = A0 × (1/2)^(t/t½)
Reference formula or conversion factor shown for context.
mean lifetime τ = t½/ln2
Arithmetic average — sum divided by count. Simple and familiar, but pulled by outliers. If your data contains extreme values, the median may be more representative.