How to use this compound interest calculator
Fill in the fields above and click Calculate to see how your money could grow over time.
Inputs
- Initial amount – how much you invest or save at the start.
- Monthly contribution – extra money you add every month.
- Annual interest rate – the expected yearly return (before taxes and fees).
- Years – how long you plan to keep the money invested.
- Compounding frequency – how often interest is added to your balance.
What the results show
- Final balance – the estimated future value of your investment.
- Total contributions – how much money you put in (initial amount + monthly deposits).
- Interest earned – how much of the final balance comes from growth rather than deposits.
Example
If you start with $10,000, earn 6% per year, and leave the money
invested for 20 years with monthly compounding, your balance could grow to
roughly over $32,000 – more than triple your initial amount.