Arbitrage Betting (Surebet) Calculator
Identify guaranteed profit opportunities by comparing odds from different bookmakers. Calculates stake distribution and ROI for 2-way and 3-way markets.
About
Arbitrage betting, or "surebetting," is a mathematical strategy that exploits price differences between various bookmakers to guarantee a profit regardless of the event's outcome. By covering all possible results of a sporting event at odds that imply a total probability of less than 100%, a bettor can lock in a positive return.
Speed and precision are critical in arbitrage. Odds change rapidly, and miscalculating the stake distribution can lead to significant exposure. This calculator instantly determines the exact amount to wager on each outcome (Home, Away, or Draw) based on your total available bankroll, ensuring equal profit across all scenarios.
Formulas
An arbitrage opportunity exists when the sum of the inverse of the odds (Implied Probability) is less than 1.
The individual stake for each outcome (Si) is calculated to ensure equal return:
Reference Data
| Odds Format | Example Value | Implied Probability | Conversion Formula (to Decimal) |
|---|---|---|---|
| Decimal (European) | 2.50 | 40.00% | x |
| Fractional (UK) | 6/4 | 40.00% | (Num / Den) + 1 |
| American (Moneyline +) | +150 | 40.00% | (Odds / 100) + 1 |
| American (Moneyline -) | -200 | 66.67% | (100 / |Odds|) + 1 |
| Hong Kong | 1.50 | 40.00% | x + 1 |
| Indonesian | 1.50 | 40.00% | x + 1 |
| Malay (Positive) | 0.60 | 62.50% | (1 / x) + 1 (Approx logic) |
| Implied Probability | 50% | 50.00% | 1 / (Prob / 100) |