The Compound Interest Calculator helps you understand how savings or investments can grow over time when interest is added to the balance on a regular basis. Unlike simple interest, compound interest means you earn interest on both the original principal and the interest that has already been added. This effect can significantly increase the final amount, especially over long periods.

You can enter the starting principal, annual interest rate, number of compounding periods per year, and total number of years. The calculator then shows the future value of the investment and the total interest earned. It is ideal for comparing savings accounts, long-term investments, or loan scenarios where compound interest plays a major role.

All calculations are performed locally in your browser, and none of your values are saved. The interface is clear and mobile friendly so you can quickly test different combinations and visually see how even small changes in rate or duration affect the outcome. This tool is particularly helpful for students and individuals building financial awareness.