Calculators / Arbitrage calculator
Arbitrage calculator
Split a stake across books so every outcome pays the same.
Enter the best price on each outcome and a total stake.
How it works
When the best prices on every outcome imply less than 100% in total, betting each side in proportion to its implied probability locks in a profit whatever happens.
Each stake is the total times that side's implied probability, divided by the sum of all of them. Stakes are rounded to cents, so the payouts can differ by a few cents.
Books can void bets placed at clearly wrong prices, and settlement rules differ (overtime, retirements), so check both sides settle the same way.