Calculators
Arbitrage Calculator
Bookmakers don't always agree on the odds. When they don't, you can turn the discrepancy into profit. The arbitrage calculator finds the exact stakes you need to place so you walk away with a guaranteed profit, no matter the outcome of the game.
2-Way Arbitrage Calculator
Calculate the exact stakes needed to lock in guaranteed profit across two bookmakers. Enter the odds and your first stake — the rest is calculated for you.
What is Arbitrage Betting?
Arbitrage betting, also called arbing or surebetting, is placing bets on every outcome of the same event across different bookmakers to guarantee a profit regardless of the result.
Bookmakers set their own odds independently, and they don't always price markets the same way. When one bookmaker prices a team much higher than another, the combined implied probability of all outcomes can fall below 100%. That gap is the arbitrage opportunity, and it means there's a way to bet on every side and still come out with a profit.
If the combined implied probability of all outcomes is below 100%, an arb exists. The further below 100%, the bigger the profit.
How to Use the Arbitrage Calculator
Once you've spotted a potential arb, enter the required data into the arb calculator, and it does the rest. The tool takes the odds and your first stake, then automatically calculates the remaining stakes needed to guarantee a profit across every outcome.
For the 2-way arbitrage calculator, you enter:
Odds 1 and Odds 2: The odds for each outcome across different bookmakers
Stake 1: Your stake for the first outcome
Stake 2 is calculated automatically.
For the 3-way arbitrage calculator, you enter:
Odds 1, Odds 2, and Odds 3: The odds for each outcome across different bookmakers
Stake 1: Your stake for the first outcome
Stakes 2 and 3 are calculated automatically. The calculator then returns your total stake, payout, guaranteed profit, and ROI across all outcomes.
The examples below walk you through how to use both the 2-way and 3-way calculators.
2-Way Example
If you're looking at a game between the Kansas City Chiefs and the San Francisco 49ers, and you notice 2.10 odds for a Chiefs win on Bookmaker A and 2.20 odds for the 49ers on Bookmaker B.
Enter Odds 1 (2.10), Odds 2 (2.20), and your Stake 1 (let’s say $50) into the 2-way arbitrage bet calculator. The second stake is calculated automatically.
Regardless of who wins, you walk away with a guaranteed profit of $7.27 on a total stake of $97.73.
3-Way Example
Imagine you're looking at a match between Manchester City and Tottenham Hotspur and you find the following odds spread across three bookmakers:
Bookmaker A (Man City win): 2.20
Bookmaker B (Draw): 3.80
Bookmaker C (Spurs win): 4.20
Enter Odds 1 (2.20), Odds 2 (3.80), Odds 3 (4.20), and Stake 1 (let’s say $100) into the 3-way arbitrage betting calculator. Stakes 2 and 3 are calculated automatically.
No matter the result, you have a guaranteed profit of $9.73 on a total stake of $210.27.
How to Find Arbitrage Betting Opportunities
The easiest way is to use an arbitrage betting finder, which scans odds across multiple bookmakers in real time and flags markets where the combined implied probability falls below 100%. Without one, you'd have to check odds manually across every bookmaker, which can be time-consuming and means most opportunities will be gone before you find them.
If you prefer doing it manually, you’ll have to pick a market, pull the best available odds for each outcome from different bookmakers, and add up the implied probabilities. If the total is below 100%, you have an arb.
The most reliable places to find arbs are:
Odds comparison sites: They show the best available price for each outcome across multiple bookmakers in one place
Odds boosts and promotions: Bookmakers regularly inflate prices on specific markets, which can create instant arb opportunities when combined with a standard price elsewhere
Betting exchanges: Exchanges often offer lay prices that create arb opportunities when combined with a bookmaker's back price
Warning Note: The calculator will often return stakes with cents, for example, $47.73 or $52.38. Avoid placing these exact figures. Bookmakers flag accounts that consistently bet to the cent, as it's a recognisable pattern associated with arbing.
Always round your stakes to the nearest $5 or $10. A small rounding difference is worth protecting your account. Make sure to keep your stakes in line with your usual betting activity.
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