Investment & Retirement Projector

Model compound growth, calculate your FIRE number, or simulate retirement withdrawals.

Investment Details

Future Value
$300,851
Starting Principal:$10,000
Total Contributions:$120,000
Total Interest Earned:$170,851

Investment Calculator: Compound Interest & Growth

Visualize the power of compound interest. Calculate how your savings or portfolio will grow over time with monthly contributions.

The 8th Wonder of the World

Compound interest is essentially earning interest on your interest. Over long periods (10+ years), even small monthly contributions can grow into significant wealth.

Key Inputs

  • Initial Amount: What you are starting with today.
  • Return Rate: The annual percentage yield (APY). The S&P 500 historically averages roughly 10%, while savings accounts are lower.
  • Contributions: Adding money regularly (Dollar Cost Averaging) accelerates growth exponentially.

Frequently Asked Questions