Compound Interest Calculator

Calculate the power of compound interest on your investments and savings with optional monthly contributions.

Basic Compound Interest Calculator

Compound Interest with Monthly Contributions

Understanding Compound Interest

The Formula

A = P(1 + r/n)^(nt)

  • A = Final amount
  • P = Principal (initial investment)
  • r = Annual interest rate (decimal)
  • n = Number of times interest compounds per year
  • t = Number of years

Power of Compounding

Compound interest is interest earned on both the initial principal and previously earned interest. This creates exponential growth over time.

The earlier you start investing, the more time your money has to compound and grow.

Investment Tips

  • Start investing early
  • Make regular contributions
  • Choose accounts with higher interest rates
  • Consider more frequent compounding
  • Be patient - compounding takes time