Compound Interest Calculator

Compound interest is growth on top of growth. This calculator shows how an initial investment, regular contributions, and time can work together to build your future balance.

Enter Your Numbers

This is a simplified model: it assumes a steady average return and contributions made at regular intervals. Real markets move up and down.

Initial investment ($) Regular contribution ($) Number of years

Expected annual return (% per year) Contribution frequency Compounding frequency

Results

Enter your numbers above and click “Calculate growth”.

	Amount
Total contributions
Interest earned
Ending balance

For more background, read Compound Interest and Risk vs Return.