Compound Interest Calculator

Calculate compound interest with principal, rate, time, and contribution options.

Principal ($):
Annual interest rate (%):
Years:
Compounds per year:
Monthly contribution ($):

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About the Compound Interest Calculator

The Compound Interest Calculator helps you understand how money grows when interest is added not only to the initial amount, but also to the accumulated interest. This is one of the most powerful concepts in finance and investing.

Why use a Compound Interest Calculator?

How to use the tool

  1. Enter the initial amount (principal).
  2. Enter the interest rate and the number of years.
  3. Choose how often interest is compounded (annually, monthly, daily).
  4. Click Calculate to see the final amount and growth chart.

Example: Investing $1,000 at 5% annual interest for 10 years, compounded annually, results in $1,628.89.