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What is arbitrage betting?
Arbitrage opportunities exist when two sportsbooks price the same event differently, allowing you to bet both sides and guarantee a profit regardless of the outcome. These are true risk-free bets — the math locks in your return before the game starts. Best used when you want guaranteed, risk-free returns. Act fast — high ROI arbs typically disappear within minutes as books adjust their lines.
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Arb opportunities
Event / Market Game Time Posted Bet 1 Bet 2 ROI Profit
Arbitrage calculator

Guaranteed profit
ROI
Bet 1
Selection
Odds
Optimal stake
Payout
Bet 2
Selection
Odds
Optimal stake
Payout

What if I bet different amounts?

Adjust each stake to see how your actual profit changes vs the optimal split.