A top holdings comparison tool that shows which stocks two ETFs actually share. A portfolio analyzer that maps your fees, overlap, and concentration. A fee calculator that makes expense ratios impossible to ignore. An investment calculator and a Coast FIRE calculator for projecting your numbers. Two quizzes that tell you what kind of investor you actually are. A glossary for every term your brokerage app uses without explaining. No account, no upsell, just the tools.
Enter any two ETFs and see which companies they share in their top 10 positions — and how much weight each fund puts behind them. Useful for spotting accidental concentration before you buy a second fund.
Enter your ETF holdings and see your weighted expense ratio, diversification score, risk level, and 30-year fee impact — all in one view. Works with up to 10 funds and runs entirely in your browser.
Project how an investment grows with compound interest. Answer three questions in one tool: what your money becomes, how long it takes to hit a goal, or how much to invest each month to get there.
Find the age you can stop saving for retirement and let compounding finish the job. Includes a plain-English explainer of what Coast FIRE means, so it works even if the term is brand new to you.
See exactly how expense ratios eat into your returns. Plug in two funds and watch small fee differences compound into real dollars over decades.
Five ETF investor archetypes, from the hands-off index investor to the dividend compounder. A few questions about how you think about risk and time, and you'll see which approach fits your actual behavior, not just your intentions.
Ten questions covering your time horizon, risk tolerance, and income goals. The output is a detailed investor profile with specific ETF categories that fit your situation, not generic advice that applies to everyone.
Every core ETF term defined clearly: expense ratio, tracking error, NAV, bid-ask spread, and everything else your brokerage app mentions without explaining. Color-coded by category, with a new featured term every day so you actually retain it.
ETF BFF offers eight free tools: a top holdings comparison tool that shows which stocks two ETFs share in their top 10 positions, a portfolio analyzer that maps fees and concentration across your holdings, an investment calculator that projects compound growth toward a goal, a Coast FIRE calculator that finds the age you can stop saving for retirement, a fee calculator that projects the 30-year cost of any expense ratio, an ETF archetype quiz that identifies your investing style, a structured investor profiler, and a growing ETF glossary covering every term you'll encounter as an investor. No account or sign-up is required. All tools are strictly educational and do not constitute financial advice.
Last updated
An ETF fee calculator shows you how an expense ratio — the annual percentage an ETF charges — reduces your returns over time. Because investing is a compounding game, even a 0.5% difference in fees can cost you $20,000 or more over 30 years. Enter your numbers, see the gap.
For broad index ETFs, 0.20% or lower is a reasonable benchmark — the best passive funds often come in at 0.03%–0.10%. Actively managed ETFs typically run 0.50%–1.00%. The more passive and broad the fund, the lower the fee should be. Use the Fee Calculator to see what any ratio costs in real dollars over your timeline.
Start with your timeline, risk tolerance, and goals. The Investor Profiler walks through 10 questions and maps your answers to an investor type with relevant ETF categories. The Archetype Quiz does something similar with a lighter, personality-based angle. Neither is financial advice, but both give you a clearer framework to work from.