Exponential Growth Calculator
Calculate exponential growth with a chart and doubling time. Enter initial value, growth rate and time periods to see the final value and curve.
How to use this tool
- Enter initial value, growth rate per period and number of periods in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your final value and the full breakdown beneath it.
Exponential growth follows A = P(1 + r)^t, where P is the initial value, r the growth rate per period, and t the number of periods. The doubling time is log(2) / log(1+r).
Frequently asked questions
- What is doubling time?
- The number of periods it takes for the quantity to double. For 10% growth the doubling time is about 7.27 periods (the Rule of 72 estimates ~7.2).
- Can I use years, months or any unit?
- Yes — just be consistent. If rate is per year, time must be in years.