Free trading calculators

Fast, no-sign-up tools for the math you should run before every trade. Everything computes in your browser — nothing is stored or sent anywhere.

Position Size Calculator

Find the exact number of units, shares, or lots to trade so a stop-out costs only what you decided to risk.

Get your reward-to-risk ratio, R-multiple, and the break-even win rate a setup actually requires.

See your daily and maximum loss floors — static or trailing — and how much room is left before a challenge fails.

TradeInsights runs this math on every real trade automatically — and adds AI coaching, broker sync, and prop firm tracking on top. Free to start.