Arbitrage Calculator

What is Sports Betting Arbitrage?

Arbitrage (arbing) is when you bet both sides of a market across different sportsbooks at odds that guarantee profit regardless of the outcome. This happens when the combined implied probability of both sides is less than 100%.

How to Find Arbitrage Opportunities

Arbs occur when different sportsbooks have significantly different lines on the same market. To find them: compare odds across multiple books, look for markets with high disagreement, and act fast — arbs close quickly.

Arbitrage Example

Book A offers Team X at +150 (40% implied). Book B offers Team Y at -130 (56.5% implied).
Combined: 40% + 56.5% = 96.5% — less than 100%!
With $1,000: Bet $415 on Team X, $585 on Team Y. Guaranteed profit: ~$35.

Arbitrage Risks

• Account limits: Sportsbooks will limit or ban consistent arb bettors
• Odds changes: Lines can move before you get both bets in
• Bet limits: You might not be able to bet the full calculated amount
• Voided bets: If one side gets voided, you're exposed on the other