Compound Interest Calculator
See how your savings grow when interest earns interest over time.
Calculate
Calculate
Result
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The formula
A = final amount, P = principal, r = annual rate, n = compounds per year, t = years.
A = P(1 + r/n)^(nt)
Worked example
- P = $10,000, r = 5%, n = 12, t = 10
- A = 10000 × (1 + 0.05/12)^120
- A ≈ $16,470
Result: Final: $16,470
Interesting facts
Einstein's quote?
Compound interest is often called the eighth wonder of the world — whether Einstein said it is debated, but the math is real.
Frequently asked questions
Interest calculated on both the initial principal and accumulated interest from previous periods.