Half-Life Calculator
Online calculator to calculate the half-life given a given decrease per period
This function calculates the time or periods it takes until the value of an amount is halved for a given decrease per period.
Alternatively, the decrease can be calculated in % per period, which is needed to halve the value in the specified time.
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Half-life formulas
\(t\) = half-life (periods)
\(d\) = decrease in % per period
\(\displaystyle t = \frac{log(0.5)}{log(1-\frac{d}{100})}\)
\(\displaystyle d=-(e^{\left(\frac{log(0.5)}{t}\right)}-1)\cdot 100\)
More Percent Functions
Percentage Change • Decimal to Percent • Percentage Decrease • Doubling Time • Exponential Decay • Exponential Growth • Fraction to Percent • Half Life • Percentage Increase • Percentage • Percentage Difference • Percentage of Percentage • Percent to Decimal • Percent to Fraction • Percent to Ratio • Percent to Total • Ratio to Percent • Percent Value
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