This investment calculator projects the future value of a portfolio from a starting amount, regular contributions, expected annual return and time horizon. Updated June 2026.
Compound Interest Estimator
How Compound Growth Works
Compound interest allows your investments to grow exponentially by earning interest on both the initial amount and the interest already earned. This calculator shows how your money grows over time assuming reinvestment and annual compounding.
Example: Investing $10,000 in 2026
If you invest $10,000 for 15 years at an annual return of 7%, you’ll end up with over $27,500. That’s the power of compound interest over time — and the earlier you start, the more you earn.
Frequently Asked Questions
- Does this include inflation? No, it's a nominal return. Adjust manually if needed.
- Can I change the compounding frequency? This version uses annual compounding only.
- What if I add monthly deposits? Try our advanced compound calculator for monthly contributions.
Try related tools: Compound Interest (Advanced), Retirement Calculator, Income Tax Estimator