Exponential Decay Calculator
Remaining = initial × (1 − rate) ^ periods.
Inputs and units
- Initial amount: Enter your value in the format and unit shown.
- Decay per period (%): Enter your value in the format and unit shown.
- Number of periods: Enter your value in the format and unit shown.
Calculation method
Remaining = initial × (1 − rate) ^ periods.
Worked example
The example values are: Initial amount = 100; Decay per period (%) = 10; Number of periods = 5
- Remaining amount: 59.049
- Half-life (periods): 6.578813479
Assumptions and limitations
Discrete periodic decay; do not enter a continuous decay constant as the percentage.
Using your result
Select Calculate after changing inputs. Copy result copies the displayed output; Download result saves a text file. Reset returns the form to its example inputs. Calculations run in your browser.
Exponential Decay Calculator FAQs
What method does this calculator use?
Remaining = initial × (1 − rate) ^ periods.
What should I check before using the result?
Discrete periodic decay; do not enter a continuous decay constant as the percentage.