📈 Compound Interest & Investment Return Calculator
Calculate compound interest growth, monthly investment contributions, and inflation-adjusted future wealth. Interactive financial projection tool, 100% free and private.
💵 Principal & Contribution Setup
📈 Future Wealth Projection
$0Total Future Balance
$0Total Interest Earned
$0Total Cash Deposited
$0Inflation-Adjusted Value (Today's Buying Power)
Principal vs Interest Breakdown
Principal Deposited (50%)
Compound Interest (50%)
❓ Frequently Asked Questions
Why is Compound Interest called the 8th wonder of the world?
Compound interest generates return on both your original investment principal and the accumulated interest from previous periods. Over long time horizons (10+ years), exponential interest growth surpasses total money deposited.
What is an average realistic annual return rate for index funds?
Historically, broad stock market index funds like the S&P 500 have averaged around 7% to 10% annual returns over long multi-decade periods before adjusting for inflation.
Is my personal financial projection data saved or sent to any server?
No. All compound interest calculations, future value projections, and inflation adjustments run 100% locally in your web browser.
