Compound Interest Calculator

Calculate your investment growth with compound interest

Compound Interest Calculator

Your Investment Summary

10,000
Interest Earned: $2,500
Period Starting Balance Contribution Interest Earned Ending Balance

Understanding Compound Interest

Compound interest is the addition of interest to the principal sum of an investment or loan, or in other words, interest on interest. It is the result of reinvesting interest, rather than paying it out, so that interest in the next period is then earned on the principal sum plus all the accumulated interest from previous periods.

How Compound Interest Works

Compound interest grows your investment at an accelerating rate because the interest is calculated on the initial principal plus all the accumulated interest from previous periods. Key factors that affect your compound interest earnings include:

  • Initial Principal: The starting amount of your investment
  • Interest Rate: The percentage rate at which your investment grows
  • Investment Duration: How long you keep your money invested
  • Compounding Frequency: How often interest is calculated and added to your principal
  • Additional Contributions: How much and how often you add to your investment

Power of Compound Interest

The power of compound interest becomes more pronounced over longer investment periods. Albert Einstein is often quoted as referring to compound interest as the "eighth wonder of the world" because of its potential to grow wealth exponentially over time.

Investment Tips

Here are some tips to maximize your compound interest earnings:

  • Start investing as early as possible to take advantage of time
  • Choose investments with higher interest rates
  • Reinvest your earnings instead of withdrawing them
  • Make regular contributions to your investment
  • Select an appropriate compounding frequency