Free Compound Interest Calculator
See how your money grows when interest compounds over time. Enter an initial deposit, a monthly contribution, an annual rate and a term to project the final balance and total interest earned.
How to Use
Fill in the starting amount, how much you add each month, the annual interest rate and the number of years. The calculator compounds monthly and shows a year-by-year growth table.
- Initial deposit plus recurring monthly contributions
- Monthly compounding (standard for savings and loans)
- Year-by-year balance breakdown
- Shows total contributions vs interest earned
- Change any field to recalculate instantly
Why compounding matters
Compound interest means you earn interest on your interest, so growth accelerates the longer you stay invested. Small, regular contributions combined with time are often more powerful than chasing a higher rate.
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