Arbitrage Calculator
How To Use This Calculator
Find guaranteed profit opportunities by betting on all outcomes across different sportsbooks. Enter the odds from two books to see if an arbitrage exists.
Input odds from two different sportsbooks for each side.
Enter your total stake. The calculator splits it optimally.
Green means profit guaranteed regardless of outcome.
What is Arbitrage Betting?
Arbitrage betting (or "arbing") exploits odds differences between sportsbooks to guarantee profit regardless of the outcome.
When combined implied probabilities add up to less than 100%, an arbitrage opportunity exists. This calculator finds those opportunities and tells you exactly how much to bet on each side.
Best Markets for Arbitrage
Two-way markets, simple to arb
High liquidity, frequent opportunities
Point spreads create arb opportunities
Rapid odds changes create more arbs
Step-by-Step Arbitrage Example
Book A has Player 1 at 2.5, Book B has Player 2 at 2.8. Total bankroll: $1,000.
Common Mistakes to Avoid
Odds can change within seconds. If you place one leg and the other side's odds move, you could lose money. Always have both sportsbook accounts funded and ready.
Some sportsbooks have low maximum bets for certain markets. If you can't place the full calculated stake, the arb might not work. Check limits before committing.
Some books void bets on injuries or walkovers differently. If one leg is voided and the other stands, you could lose. Check settlement rules match across books.
True arbitrage requires different sportsbooks. Placing both sides at the same book is easily detected and will get your account limited or closed quickly.
Frequently Asked Questions
Is arbitrage betting legal?
Yes, arbitrage betting is completely legal. However, sportsbooks may limit or restrict accounts that consistently arb. Use multiple books and vary your bet sizes.
How much profit can I make?
Typical arbs offer 1-5% profit per bet. While small individually, this adds up over many bets with zero risk of losing.
Do I need accounts at multiple sportsbooks?
Yes. Most arbitrage opportunities require betting at 2-4 different sportsbooks. Having 10+ funded accounts gives you access to more opportunities.
How do I find arbitrage opportunities?
Our Surebets Scanner automatically finds arbs across 50+ sportsbooks in real-time, so you don't have to search manually.
How much money do I need to start arbitrage betting?
You can start with as little as $500-$1,000, but $2,000-$5,000 across multiple sportsbook accounts is recommended. Since typical arbs return 1-5% per bet, larger bankrolls generate more meaningful profits.
Can sportsbooks ban you for arbitrage betting?
Sportsbooks can't ban you since arbing is legal, but they can limit your account — reducing maximum bet sizes or closing your account. To minimize detection, vary your bet sizes, avoid round numbers, and spread activity across many books.
How long do arbitrage opportunities last?
Most arbs last only a few minutes to a few hours before odds adjust. Live betting arbs can disappear in seconds. Speed is critical — using a real-time surebet scanner and having funded accounts ready gives you the best chance of capturing arbs.
Why Arbitrage is Risk-Free
Unlike regular betting, arbitrage guarantees profit because you're covering all outcomes. The calculator ensures you bet the right amounts on each side so you profit no matter who wins. The only "risk" is odds changing before you place all bets.