Rapid Population Growth: 5% for 25 Years
A population of 1,000,000 growing at 5% annually for 25 years would reach approximately 3.39 million.
How to use this tool
- Enter initial population, annual growth rate and years in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your final population and the full breakdown beneath it.
A 5% annual growth rate, seen in fast-growing cities and regions, triples a population in about 25 years.
Frequently asked questions
- What is the difference between continuous and annual compounding?
- Continuous uses e^(rt); annual uses (1+r)^t. For small r they are close, but continuous growth is slightly faster and is the standard in population biology.
- Can growth rates be negative?
- Yes — a negative rate models population decline or any shrinking quantity.