Betting tools
Arbitrage
Split a stake across two books to lock a margin while prices hold.
Arbitrage Calculator
Split your stake across two books to lock a margin.
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Enter both decimal odds and your total stake to see the split.
How to use it
Enter the decimal odds for each outcome and your total stake. The calculator splits the stake across both books so either result returns the same amount, then shows the margin as a percentage of your stake.
What it means
When two prices together cover the market for less than they pay out, the position carries a margin while those odds hold. It depends on the prices not moving and on staking each side correctly — a market inefficiency, not a payout promise.
For education only — not financial advice. 18+. Gamble responsibly. Past performance does not guarantee future results.