Exponential Growth Calculator
Enter a starting value, the percentage change per period and the number of periods.
This result is an estimate only. Double-check important figures before relying on them.
How it is calculated
- Final = start × (1 + rate ÷ 100)ᵗ
- Doubling time = ln 2 ÷ ln(1 + rate ÷ 100)
For a quick doubling estimate, use the doubling time calculator.
Worked example
1,000 growing 5% for 10 periods:
- Final 1,628.89
- Up 62.89%, doubling in about 14.2 periods
Why your number may differ
Real growth is rarely perfectly steady. Treat the result as a model, not a forecast.
Frequently asked questions
What is the formula?
Final = start × (1 + rate)ᵗ, where the rate is per period and t is the number of periods.
How is the doubling time found?
ln 2 ÷ ln(1 + rate). At 5% it is about 14.2 periods.
Can I use it for decay?
Yes. Enter a negative rate, such as −10 for a value that loses 10% each period.