See how your money grows with compound interest. This powerful calculator shows the future value of your investments with any compounding frequency — daily, monthly, quarterly, or yearly.
Using this compound interest calculator is straightforward. Start by entering your initial principal — the amount you're investing upfront. Then input the annual interest rate you expect to earn, and select how often interest compounds (daily, monthly, quarterly, or yearly).
Set your investment time horizon in years. You can also add a monthly contribution if you plan to add money regularly — this is one of the most powerful ways to build wealth over time.
The results show your future value (total investment value at the end), your total contributions, the total interest earned, and the effective annual rate (APY). The effective rate is particularly useful because it accounts for the compounding frequency — daily compounding yields a slightly higher effective rate than yearly compounding at the same nominal rate.
For more financial planning tools, explore our Mortgage Calculator and Car Loan Calculator.
Where: A = future value, P = principal, r = annual rate, n = compounding periods per year, t = years, and PMT = monthly contribution.