Free tools

# Free market tools

> Free market calculators that run in your browser with no sign-in. Each one shows its formula and a worked example.

Calculators that answer one market question each, in your browser, with no sign-in and no account.

- Crypto and FX
  ## [Position size calculator](https://younna.ai/tools/position-size-calculator)
  Size a crypto or FX position from account balance, risk percentage, entry and stop.
- Stocks and options
  ## [Options profit calculator](https://younna.ai/tools/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](https://younna.ai/tools/prediction-market-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 →](https://younna.ai/#how-it-works)