Zinātnes laboratorija

Decay constant

Convert half-life into the exponential decay constant.

Start with the idea

This calculator is a scientific workspace. Read the quantities and units first; use the equation only after the physical meaning is clear.

λ = ln2/T½

Reference constant used by this model where applicable: 0.6931471805599453. Keep SI units consistent before interpreting a numerical result.

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Result uses the reciprocal of the time unit entered.

Mendeleev

Before trusting the result, ask whether the units and order of magnitude make sense. A calculator cannot rescue a wrong physical model.

Go deeper

Core Science · Science paths

Primary reference spine: BIPM SI · NIST/CODATA · IUPAC.