Compound Interest Calculator

Visualize the effect of compounding with a starting balance, recurring contributions and an assumed rate.

Starting amount ($ / ₹)

Monthly contribution ($ / ₹)

Annual return (%)

Years

Enter your numbers and select Calculate.

What this calculator helps you understand

Free compound interest calculator for US and Indian users. Estimate future value from starting money, contributions, rate and time. The goal is to make the financial concept easier to understand by letting you test different scenarios rather than relying on a single example.

How to use it

Enter numbers that match your situation.
Change one assumption at a time and compare the result.
Use the result as an estimate, not a guarantee.

Important: This is an educational calculator. Actual results can differ because of rates, taxes, fees, plan rules, market performance, lender terms and other circumstances.

Frequently asked questions

What is compound interest?

Compounding means returns are calculated on the original money plus accumulated returns. This calculator uses a simplified monthly model.

Is the return guaranteed?

No. The return is only an assumption for the scenario.

Why are contributions important?

Regular contributions can add substantial capital over longer periods.

More free tools: All calculators · Investment growth · Savings goal · Debt payoff · Financial Life Simulator