What this tool does
Compound interest is often called the most powerful force in finance, because you earn interest not only on your original money but also on the interest already added. This calculator shows how an initial deposit grows over the years at a given rate and compounding frequency, making the long-term reward of saving early easy to see.
How to use this tool
- Enter your starting amount (principal).
- Add the annual interest rate.
- Choose how often interest compounds (yearly, monthly, daily).
- Enter the number of years and see the final balance and interest earned.
Why it matters
Seeing compounding in action is the best motivation to start saving sooner rather than later. It helps you compare savings accounts and investments fairly, understand why frequency matters, and set realistic goals for what your money could become over five, ten or twenty years.