BIOLOGY

Exponential population growth calculator

Model a population under a constant continuous growth rate.

01 / INPUTS

Your numbers

02 / YOUR RESULT
1,648.721
Modeled population

Default inputs are examples. Change them to match your situation.

How to use this calculator

Model a population under a constant continuous growth rate. Enter initial population, continuous growth rate per period (%), number of periods. The result updates when you change an input. To compare two sets of inputs, save scenario A, then enter the second set; the result panel shows the difference.

Formula and limits

Population = initial × exp(rate/100 × time). Assumes unlimited resources and a constant continuous rate; not a forecast of a real population.

Worked example

The following example uses the calculator’s starting values. It is an illustration of the method, not a recommended target.

InputExample value
Initial population1000
Continuous growth rate per period (%)5
Number of periods10

Modeled population: 1,648.721

Interpreting your result

These are simplified mathematical models with explicit assumptions. Real populations and biological systems may not follow a constant exponential rate. No clinical dosing or treatment use is intended.

Comparing alternatives

Save the first result as scenario A, then change one input. The comparison shows the numeric difference; it does not label either result as better. Choose inputs that describe realistic alternatives. Values shown on screen are rounded, so calculations from rounded intermediate results may differ slightly.

Implementation updated September 25, 2026 · How we check calculations