Arbitrage Calculator
Find sure bets (arbitrage opportunities) by comparing odds across bookmakers. Calculate optimal stakes with multiple staking plans including smooth rounding to avoid detection.
Arbitrage Calculator
Enter odds for up to 12 outcomes to find arbitrage opportunities
Understanding Arbitrage Betting
What is Arbitrage Betting?
Arbitrage betting (or "sure betting") involves placing bets on all possible outcomes of an event across different bookmakers to guarantee a profit regardless of the result. This works when the combined implied probability of all outcomes is less than 100%.
The Formula
Implied Probability = 1 / Decimal Odds
When the sum of all implied probabilities is less than 1 (100%), an arbitrage opportunity exists. The lower the total, the higher the guaranteed profit.
Staking Plans Explained
Split (Equal Profit)
All outcomes return exactly the same amount. This is the purest form of arbitrage with identical profit regardless of result.
Favourite Loses
The favourite (lowest odds) breaks even exactly. If any other outcome wins, you profit. Best when you think the favourite might lose.
Favourite Wins
Non-favourites break even exactly. If the favourite wins, you profit. Best when you think the favourite will win.
Smooth (Rounded)
Stakes are rounded to whole numbers (or nearest 5/10) to look more natural and avoid bookmaker detection. Slightly lower profit but safer.
Common Arbitrage Examples
| Scenario | Bookmaker A | Bookmaker B | Implied % | Profit |
|---|---|---|---|---|
| 2-Way (50/50) | 2.10 | 2.10 | 95.2% | 4.8% |
| 3-Way Match | Home: 2.50 | Draw: 3.40, Away: 3.20 | 96.3% | 3.7% |
| Tennis Match | Player A: 1.80 | Player B: 2.40 | 97.2% | 2.8% |
| No Arbitrage | 1.90 | 1.90 | 105.3% | -5.3% |
Arbitrage Betting Tips
- •Act Fast: Arbitrage opportunities disappear quickly as bookmakers adjust their odds. Have accounts ready at multiple bookmakers.
- •Use the Smooth Option: Rounding stakes to whole numbers or nearest 5/10 makes your bets look more natural and less likely to trigger bookmaker alerts.
- •Check Limits: Verify maximum stake limits at each bookmaker before placing bets. Some may not accept large enough stakes for your calculated amounts.
- •Account for Fees: Consider withdrawal fees, currency conversion, and potential taxes when calculating true profit margins.
- •Void Bets Risk: Be aware that bookmakers may void bets if they made an obvious error. Never arb with money you cannot afford to lose.
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