Odds Format
Total Stake ($)
Number of Outcomes
Outcome 1 Odds
Outcome 2 Odds
Results
Enter total stake and odds for all outcomes to see results.
What Is It?
Arbitrage betting (or “arbing”) exploits differences in odds between bookmakers to guarantee a profit regardless of the outcome. When the combined implied probabilities of all outcomes across different bookmakers total less than 100%, an arbitrage opportunity exists.
The Arbitrage Calculator takes your total stake and the best available odds for each outcome (from different bookmakers), then calculates whether an arbitrage opportunity exists, the profit margin, how much to stake on each outcome, and the guaranteed profit.
This tool supports 2-way and 3-way markets (e.g., home/away or home/draw/away). Arbitrage opportunities are rare and often short-lived, so speed is essential.
How to Use
Formulas & Data Sources
If Arb% < 1.00 (100%), arbitrage exists.
Individual Stakes:
Odds must be sourced manually from different bookmakers. The calculator does not fetch live odds ā you input the best available odds you’ve found.
Real-World Scenarios
Bookmaker A has Player 1 at 2.15, Bookmaker B has Player 2 at 2.05. Arb% = (1/2.15) + (1/2.05) = 0.4651 + 0.4878 = 0.9529 (95.29%). Arbitrage exists! With $1,000 total:
Home: 3.40 (Bookmaker A), Draw: 3.60 (Bookmaker B), Away: 2.30 (Bookmaker C). Arb% = (1/3.40) + (1/3.60) + (1/2.30) = 0.2941 + 0.2778 + 0.4348 = 1.0067.
You’d need better odds on at least one outcome.
A bookmaker offers 2.30 on Over 2.5 goals. A betting exchange has Lay Under 2.5 goals at effectively 2.10. Arb% = (1/2.30) + (1/2.10) = 0.4348 + 0.4762 = 0.9110.
Frequently Asked Questions
QIs arbitrage betting legal?
Yes, it’s legal in most jurisdictions. However, bookmakers don’t like it and may limit or close accounts of suspected arbers.
QHow do I find arbitrage opportunities?
Compare odds across multiple bookmakers for the same event. Odds comparison websites and dedicated arb-finding software can help. Opportunities typically last only minutes.
QWhat are the risks?
The main risks are: odds changing before you place all bets, bookmaker voiding bets, staking errors, and account limitations. Always double-check odds are still available before placing.
QHow much profit can I realistically make?
Typical arb margins are 1-5%. With $1,000 invested per opportunity and finding 2-3 arbs per day, you might make $20-$150 daily. Results depend heavily on available opportunities and bankroll.
