Free price allocation tool
Sports betting arbitrage calculator
Check whether two opposite prices form a mathematical arbitrage and estimate the stake allocation that equalizes the payout.
For a two-outcome market only. Both prices must refer to mutually exclusive, collectively exhaustive outcomes under matching settlement rules.
A number below 100% indicates a mathematical two-way arbitrage before limits, rounding, movement, void rules, and account restrictions.
What the result means
Use the number as an estimate
A two-way arbitrage exists when the prices’ combined implied probability is below 100%. Allocating stake in proportion to each outcome’s implied probability produces the same theoretical gross return on either result.
+110 on both opposite outcomes implies 47.62% + 47.62% = 95.24%. Splitting a $1,000 total stake evenly produces about $1,050 back, or $50 before execution costs.
How to use it
Check the inputs before the output
- 01
Verify the outcomes are mutually exclusive and cover every possible result.
- 02
Enter the exact prices and total amount you can place across both sides.
- 03
Review the index, stakes, and minimum theoretical result, then account for rounding and limits.
Important limits
What the calculator cannot verify
- A theoretical arbitrage is not operationally risk-free.
- Line movement, rejected stakes, void rules, and palpable-error clauses can leave one side exposed.
- Never assume two similarly named markets settle identically.
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