Arbitrage found — guaranteed profit of 3.60% whatever the result.
Enter the best available odds for every possible outcome (from different bookmakers) and the total amount you want to stake. If the implied probabilities sum to under 100%, an arbitrage exists: the calculator splits your stake so you profit whatever the result.
Real arbitrage windows are small and short-lived — usually 1–3% — and bookmakers may limit accounts that use them repeatedly. Treat this as an analysis tool, not a business plan.
Convert between decimal, fractional, American odds and implied probability.
Project the combined odds, payout and real probability of your acca.
Check whether a bet has positive expected value at your estimated probability.
See the bookmaker's built-in margin and what the fair odds would be without it.
Lock in a profit (or cap a loss) by betting the other side at current odds.
