Online compound interest calculator
Discover how consistency and compound interest can transform investments.
Your money in the future
Live simulationThe power of time
Track your asset growth.
Imagine going a little further
Same investment. Different horizons.
Educational simulation with a constant rate and month-end contributions. Annual rates are converted to equivalent monthly rates. Nominal values, excluding taxes, fees and inflation. Past performance does not guarantee future results.
How to use: Online compound interest calculator
Enter the initial amount, contribution, rate and duration. Check whether the rate is monthly or annual. Compare scenarios and see how much of the balance comes from contributions and how much from interest.
Before you start
The projection uses constant assumptions and does not guarantee returns. Taxes, inflation, fees and changing rates can affect actual results. Use it as a reference, not financial advice.
Frequently asked questions
How do simple and compound interest differ?
With compound interest, earnings become part of the base for later periods. With simple interest, interest is calculated on the initial principal.
Is a monthly rate the annual rate divided by twelve?
Not with compound capitalization. Equivalent rates must account for compounding periods; check the selected unit in the simulation.