Population Growth Rate Calculator
Population Growth Rate Calculator: Exponential Growth Model
When resources are effectively unlimited, populations grow exponentially: each individual reproduces at the same constant rate, so growth compounds the same way interest does in a savings account. This calculator projects future population size under that classic exponential growth model.
The Formula
N = N0 × e(r × t)
Worked Example
A population of 1,000 individuals grows at 5% per year for 10 years.
N = 1,000 × e(0.05 × 10) = 1,648.72 individuals
How to Use This Calculator
- Enter the initial population size.
- Enter the annual growth rate as a percentage.
- Enter the number of years to project forward.
- Click Calculate to get the projected population.
Related Calculations
Compare against the Logistic Population Growth Calculator, which accounts for a carrying capacity limit that exponential growth ignores.