Compound Interest Calculator
See how your investments grow with the power of compounding.
Future Value
Total Contributions
Total Interest Earned
The Power of Compound Interest
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. Albert Einstein reportedly called it "the eighth wonder of the world."
A = P(1 + r/n)^(nt) + PMT × [((1 + r/n)^(nt) − 1) / (r/n)]
The key factors are: starting amount, interest rate, time horizon, and contribution frequency. Starting early, even with small amounts, can dramatically increase your final balance due to exponential growth.