Tools · Arbitrage calculator
Enter the prices on each leg and your first stake. We size every other leg so the payout matches, then show your guaranteed profit. An arb exists when the implied probabilities of every leg add up to less than 100%, which happens when two books disagree on a price. Add a third leg for markets with a draw, like soccer. Learn more.
This tool only handles the stake math. Finding the price gap across two books is the slow part, and lines move fast once an arb shows up. Our live arb feed tracks 20+ sportsbooks, exchanges, and prediction markets and flags every cross-book arb in real time.