Split your budget or lock leg 1 stake across 2-way and 3-way markets with anti-gubbing rounding to lock in guaranteed profit.
How sports arbitrage calculations work
Arbitrage betting (surebets) occurs when bookmakers disagree on the odds for an event, creating a scenario where the sum of the implied probabilities across all outcomes is less than 100%. By placing opposing bets on all outcomes across different bookmakers, you lock in a guaranteed profit no matter who wins.
Two-outcome markets: Ideal for sports with only two results, such as tennis match winners, basketball moneyline, darts, or over/under goals and points markets.
Worked example
Tennis Two-Outcome Arb
On a tennis match with a £200 total budget, Bookmaker A offers odds of 2.15 on Player 1, and Bookmaker B offers 2.05 on Player 2.
The calculator determines stakes of £97.62 on Player 1 and £102.38 on Player 2. Both outcomes return £209.88, locking in a guaranteed net profit of £9.88 (+4.94% ROI) regardless of the match result.