How to use this Calculator

This tool calculates the future value of an investment based on your initial principal, ongoing annual contributions, and an expected rate of return. It assumes contributions are added at the end of each year.

Compound Interest FAQ

What is the "Power of Compounding"?
It is the process where the value of an investment increases because the earnings on an investment, both capital gains and interest, earn interest as time passes.

What growth rate should I use?
While the S&P 500 has averaged ~10% historically, many FIRE planners use a conservative 6% to 8% to account for inflation and market volatility.