Population Growth Calculator
Biology
Model exponential growth at a constant rate.
Formula
N = N₀(1 + r)^t
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations retain full precision.
- Simplified model without resource limits or migration.
Example Calculation
Example inputs
- Initial population: 1000
- Growth rate: 3 % / period
- Periods: 10
A population of 1,000 growing by 3% for 10 periods reaches about 1,344.
Frequently asked questions
How do I use this calculator?
Enter initial population, growth rate, periods. The result updates automatically. Use Reset to restore the example values.
What method does it use?
N = N₀(1 + r)^t. Simplified model without resource limits or migration.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.