Finance & options calculators
Educational calculators for personal finance and options trading. Plug in numbers, see the result — nothing is uploaded, nothing is logged. Not financial advice.
P/L, breakeven and ROI for calls and puts.
Price an option and see all its Greeks.
Back out IV from an option’s market price.
Project a stock’s expected move from IV.
Returns if called away, breakeven and yield.
Max profit, max loss and breakevens.
Cash-secured put → covered call cycle returns.
Find the max-pain strike from open interest.
Convert IV to an expected daily move.
Grow savings with contributions over time.
Project a savings balance from monthly deposits.
See what a high-APY account grows to.
Maturity value of a certificate of deposit.
Convert between APR and effective APY.
Project a 401(k) with employer match.
Project tax-free Roth IRA growth.
See how inflation changes buying power.
Loan payment, total interest and payoff.
Your FI number and years to reach it.
Tip, total and split per person.
Two families of calculator
For options, the options profit and Black-Scholes calculators are the workhorses; the implied volatility and expected move tools back out IV and project the daily range. Strategy-specific: covered calls, iron condors, the wheel and max pain.
For personal finance: compound interest and savings are the foundations; 401(k), Roth IRA and the FIRE calculator project tax-advantaged accounts and retirement timing. For lending and inflation: amortization, CD, APY and inflation.
Frequently asked questions
- Yes. Every calculator here is free, needs no sign-up, and runs entirely in your browser.
- No. These are educational tools, not financial advice. Personal finance is, well, personal — tax rules, contribution limits and rates change. Treat the outputs as projections, not promises.
- Options tools use a single Black-Scholes engine and the standard payoff formulas; personal-finance tools use the discrete compounding equations, with monthly contribution support where it matters. Edge cases (limits, taxes, fees) are noted on each page.