tools
Arbitrage calculator
Enter the best decimal odds you can find for every outcome of one event and a total stake. The calculator shows the market percentage and how to split the stake so every outcome returns the same amount. Prices move and books limit stakes — always check the numbers before betting.
Enter odds above 1.00 for every outcome to see the split.
Questions
What does the market percentage mean?
Add up 1 ÷ odds for each outcome. At exactly 100% the prices are fair; above 100% the difference is the bookmaker's margin; below 100% the combination pays out more than you stake, whichever outcome wins.
How is the stake split calculated?
Each outcome's stake is proportional to its implied probability (1 ÷ odds), so every outcome returns the same amount. The calculator does the division for you.
Looking for live prices to put in here? Start from the odds grids — the best price per outcome is highlighted on every match page.