Retirement & Investing Calculators
Project 401k growth, tax-free Roth IRA growth, find your Coast FIRE number, model compound interest and calculate the CAGR on any investment. Eight tools — one screen each.
All retirement & investing tools
0 toolsHow to pick the right retirement & investing tool
Workplace retirement: Start with the 401k Calculator to project your balance at retirement based on your salary, contribution rate, employer match and expected return. At minimum, always contribute enough to capture the full employer match — that is an instant 50–100% return. The Roth IRA Calculator projects tax-free growth on contributions up to the IRS annual limit.
FIRE & long-term planning: The Coast FIRE Calculator answers the key question: how big does your portfolio need to be today so that compounding alone carries you to retirement? The Future Value Calculator models any lump sum plus recurring contributions at a custom rate.
Growth & returns: The Compound Interest Calculator shows daily, monthly and annual compounding side by side. Use the Investment Return Calculator to find the CAGR on any investment. The Rule of 72 Calculator gives a fast doubling-time estimate. The Inflation Calculator shows what investment return you need to outrun rising prices.
401k limits and Roth IRA income phase-outs change yearly — see IRS Publication 590-A and IRS Publication 560.