Exponential Decay: 500 at 50% for 7 Periods
A 50% decay rate halves the value each period, reducing 500 to approximately 3.91 after 7 periods.
How to use this tool
- Enter initial value, decay rate per period and number of periods in the fields above.
- Results update instantly as you type โ or click Calculate.
- Read your remaining value and the full breakdown beneath it.
Model very fast decay where 50% is lost each period, nearly eliminating the original 500 in 7 steps.
Frequently asked questions
- What is the difference between decay rate and half-life?
- The decay rate r is the fraction lost each period; the half-life is the number of periods until only half remains. They are linked by tยฝ = log(0.5)/log(1โr).
- Does this assume continuous or discrete decay?
- This calculator uses discrete (period-by-period) decay. For continuous decay use A = Aโยทe^(โฮปt) with the half-life calculator.