Compound Interest Calculator
See how your money grows over time with the power of compound interest.
Compound Interest Formula
Compound interest is calculated as A = P(1 + r/n)nt, where:
- A = final amount
- P = principal (starting amount)
- r = annual interest rate (as a decimal)
- n = compounding frequency per year
- t = time in years
Monthly contributions are added each period at the effective rate, giving you a more realistic savings or investment projection.