VigFree Analytics | Arbitrage Calculator

What is Arbitrage Betting?

Arbitrage betting (also known as "arbing" or "sure betting") is a strategy where you bet on all possible outcomes of an event across different sportsbooks at odds that guarantee a profit regardless of the result. This occurs when sportsbooks have different assessments of probabilities, creating inefficiencies in the market. For example, if Sportsbook A offers Team X at +110 and Sportsbook B offers Team Y at +110 for the same game, you can bet both sides and lock in a profit. True arbitrage opportunities are rare but can be found with promotional odds, new sportsbooks, or during rapid line movements.

The key to successful arbitrage is calculating the exact stake amounts for each outcome so that your profit is the same no matter what happens. If the combined implied probability of all outcomes is less than 100%, you have an arbitrage opportunity. For a two-outcome event, you can use the formula: Stake 1 = Total Investment × (1/Odds 1) / [(1/Odds 1) + (1/Odds 2)]. Professional arbitrage bettors use software to scan dozens of sportsbooks simultaneously looking for these opportunities, which typically offer 1-5% profit margins.

This calculator helps you identify and execute arbitrage bets by computing the optimal stakes for both sides and showing your guaranteed profit percentage. Enter the odds for both outcomes (from different sportsbooks) and your desired wager on one side. The calculator determines how much to bet on the other side to lock in profit. Use it to exploit market inefficiencies, promotional odds, or temporary pricing errors for risk-free returns.