Finance Tools
Compound Interest Calculator
See how your investments grow over time with the power of compounding.
Compounding Frequency
Breakdown
Rule of 72
At 10%, your money doubles every ~7 years
Calculations assume a constant interest rate and regular repayment schedule. Actual loan costs may vary.
Growth Over Time
Frequently Asked Questions
What is compound interest? +
Compound interest is interest calculated on both the initial principal and the accumulated interest. Unlike simple interest, it grows exponentially, which is why starting early makes such a dramatic difference.
How does compounding frequency affect returns? +
More frequent compounding means slightly higher returns. Monthly compounding yields more than yearly compounding at the same rate. For most investments, the difference is small but meaningful over long periods.
What is the Rule of 72? +
Divide 72 by your annual interest rate to estimate how many years it takes to double your money. At 8%, your money doubles in approximately 9 years (72 ÷ 8 = 9).