Calculator
Arbitrage Betting Calculator — Lock In Guaranteed Profit
Arbitrage betting means placing bets on every outcome of an event across different sportsbooks so you profit no matter what happens. It works when the combined implied odds of both sides sum to less than 100%. Enter the best price you can find on each side.
If an arb opportunity exists, the profit % shows your guaranteed return on total stake. Stake A and Stake B are the exact amounts to place at each book.
Compare live prices across books →Best price you can find on the first outcome (e.g. Team A to win)
Best price on the opposite outcome at a different book
Total amount to split across both sides
How this works
Formula
stake_A = total × (1/decimal_A) / (1/decimal_A + 1/decimal_B)
Worked example
+110 at Book A and +110 at Book B on opposite sides. $1000 total → $500 each → guaranteed $50 profit (5%).
FAQ
Is arbitrage betting legal?
Yes. Arbing is legal everywhere sports betting is legal. Books may limit accounts that arb consistently — spread action across many books.
How much profit do arbs typically yield?
Most arbs return 0.5–2% of total stake. 3%+ arbs usually involve stale lines that close within minutes.
Can I three-way arb?
Yes — soccer 1X2 and three-way fight markets can arb. Use the three-outcome variant of the formula.
Do round-number stakes get flagged?
Yes. Stake $487 instead of $500. Vary timing and books — pattern-matching is how books detect arb accounts.
What about taxes?
Each side is a separate wager. Winning side is taxable; losing side may be deductible depending on jurisdiction.