Calculators / Arbitrage (surebet)
Arbitrage calculator
Two or three books quoting different favourites can add up to less than 100%. Split your stake correctly and you profit whichever one wins.
The next step
in sports analysis.
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| Book / selection | Odds | Stake | Returns |
|---|
Combined book
Locked profit
Return on stake
How it works
Add the implied probability of every outcome across the books offering the best price on each. If the total is under 100%, the combined market is mispriced in your favour — that gap is the arb.
Stake each outcome the same way as dutching: in proportion to its implied probability, so every possible winner returns the same total payout regardless of which book pays it.
Worked example
Book A prices the home win at 2.30 (43.5%), Book B prices the away win at 2.50 (40.0%) — a combined book of 83.5% on a $200 total stake.
| Book A — Home, 2.30 | $104.17 |
| Book B — Away, 2.50 | $95.83 |
| Return, either winner | $239.58 |
| Locked profit | $39.58 |