Free · Private · Runs in your browser
See what your money becomes.
Turn the numbers you already know into the answer you actually want.
0 bytes leave your device No account Open-source math
Portfolio at 7% real · 35 years
$1.68M
Browse by category
Five families, every money question.
- FIRE Family
When can you stop working?
Four flavors of financial independence — same compounding math, different lifestyle bets.
5 calculators - Income & Wealth
What you make. What you keep.
Your real hourly rate, what to charge clients, what you're worth, and what the IRS takes.
6 calculators - Selling & Reseller
What marketplaces actually take.
eBay, Etsy, Mercari, Poshmark — every fee on a sale, your net payout, and the breakeven price.
6 calculators - Investing
What money does over time.
Compounding, annualized returns, and inflation — the three forces that decide what your money becomes.
4 calculators - Debt & Costs
What things actually cost.
Money flowing out — over the full term, not the sticker. Loans, recurring obligations, big purchases.
6 calculators