Calculate how your investment grows over time with compound interest. See year-by-year breakdown instantly.
| Year | Balance | Interest Earned | Total Interest |
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Compound interest is interest calculated on both the initial principal and the accumulated interest. Unlike simple interest, it causes your investment to grow exponentially over time — often called the "eighth wonder of the world."
The formula is: A = P(1 + r/n)^(nt) where P = principal, r = annual rate, n = compounds per year, t = years. Our calculator also accounts for regular monthly contributions.
Compound interest is interest calculated on both the initial principal and accumulated interest. It causes investments to grow exponentially over time.
The formula is A = P(1 + r/n)^(nt), where P is principal, r is annual rate, n is compounds per year, and t is time in years.
At 8% annual interest compounded monthly, $10,000 will grow to approximately $22,196 in 10 years.