Arbitrage Calculator
Check two or three-way odds across bookmakers for a guaranteed-profit arbitrage opportunity and the stake split needed.
Arbitrage
6.93%
Guaranteed profit
74.42
ROI
7.44%
Implied prob. sum
93.07%
Stake on A
511.63
Stake on B
488.37
How it works
Add the implied probability of each outcome (1 ÷ decimal odds). If the sum across all bookmakers is under 100%, betting the right amount on each outcome locks in the same profit no matter which one wins — the stake split above shows exactly how to divide your total stake to achieve that.
FAQs
What is sports betting arbitrage?
It's betting on every possible outcome of an event across different bookmakers, at odds high enough that the combined payout guarantees a profit regardless of which outcome happens — possible when bookmakers disagree enough on odds that the implied probabilities add up to less than 100%.
Why is the arbitrage percentage sometimes negative?
A negative or zero arbitrage percentage means no risk-free opportunity exists at the odds entered — the implied probabilities add up to more than 100%, which is the bookmaker's normal built-in margin.
What are the practical risks of arbitrage betting?
Odds can move before you get all bets placed, bookmakers may limit or void bets on the losing side ("stake not accepted"), and accounts that arbitrage heavily are often restricted by operators. The math is risk-free; execution in practice is not.