Compound Interest Calculator

See how your money could grow over time! Enter your starting amount, monthly contributions, interest rate, and years of saving, then click Calculate.

The amount of money you already have to start with. How much you plan to add each month. Use 0 if you won't add more. The yearly growth of your money. Check your bank account, term deposit, or investment fund for this rate. How many years you plan to leave the money invested.
Enter numbers above and click Calculate to see your growth chart
Red dashed line shows total saved without interest. The difference highlights the effect of compounding.

How It Works

This calculator uses standard compound interest: it adds your monthly contributions and applies the annual interest rate. The chart shows how your money grows each year.

📅 Monthly compounding is used

This calculator applies interest every month, which matches how most real-world savings accounts, term deposits, and investment funds actually work.

How the monthly rate is calculated:

Monthly rate = Annual rate ÷ 12

For example, a 6% annual rate becomes 0.5% per month (6 ÷ 12 = 0.5%). Each month, your contribution is added first, then interest is applied to the combined total:

New balance = (Balance + monthly contribution) × (1 + monthly rate)

Your contribution is added first, then interest is applied to the combined amount — meaning your deposit earns interest in the same month it goes in. This is the standard approach used by most savings calculators.

⚠️ This calculator is for educational purposes only. It is not financial advice. Actual results may vary and depend on your bank, investments, and market conditions. Always consult a financial professional before making decisions.