Free Calculator
Enter the odds from different bookmakers to check if an arbitrage opportunity exists and calculate the exact stakes needed for a guaranteed profit.
This is the total amount you will spread across all bookmakers.
Enter decimal odds (e.g. 2.50). Minimum 2 outcomes required.
Arbitrage opportunity exists!
Combined implied probability: 97.74% (arb margin: 2.26%)
| Outcome | Bookmaker | Odds | Implied prob | Stake | Return if wins |
|---|---|---|---|---|---|
| Home Win | Bookmaker A | 2.10 | 47.6% | £487.18 | £1023.08 |
| Draw | Bookmaker B | 3.80 | 26.3% | £269.23 | £1023.08 |
| Away Win | Bookmaker C | 4.20 | 23.8% | £243.59 | £1023.08 |
Total staked
£1000.00
Guaranteed return
£1023.08
Guaranteed profit
£23.08 (2.26%)
Arb % = (1÷OddsA + 1÷OddsB + ...) × 100 — if this is below 100, a profit-guaranteed arb exists.
Stake_i = Bank × (1÷Odds_i) ÷ (Arb%÷100) — this distributes your bank so each outcome returns the same amount.
Rounding stake amounts to the nearest £0.01 may cause small discrepancies in equal returns — in practice, aim for equal return to within ±£0.05.
