Free market tools
Calculators that answer one market question each, in your browser, with no sign-in and no account.
- Crypto and FX
Position size calculator
Size a crypto or FX position from account balance, risk percentage, entry and stop.
- Stocks and options
Options profit calculator
Payoff, maximum profit, maximum loss and break-even at expiry for single options and common spreads.
- Prediction markets
Prediction-market price to probability
Turn a price in cents into an implied probability and the break-even probability after the Kalshi taker fee.
Build them into your own app
Each calculator here starts from numbers you type. Younna builds a personal app that starts from yours: your account size, your stop rule and the positions you hold, kept up to date with live market data.
Younna never places trades.
See an example app on the home page →