Free trading calculators
Free, browser-based tools for sizing positions, planning trades, and stress-testing your risk. Every calculator runs entirely on your device — no signup, no tracking, no data sent to a server. We built these because we use them ourselves every trading day.
More on the way
We're rolling out a new calculator every week, prioritized by what traders actually search for: Kelly criterion, forex + futures position sizing, risk-of-ruin, stop-loss distance, and compound interest. Bookmark this page or join the newsletter to know when they go live.