Calculate Arbitrage
Guaranteed profit by covering every outcome across books.
How to Use This Calculator
- Drop in the odds for each outcome, pulling from different bookmakers
- Set your total stake — the amount you want to put to work
- Tap to add more outcomes when you need them (handy for 3-way markets like soccer)
- If an arb is live, the app surfaces the optimal stake per outcome plus your locked-in profit
Formula
Arbitrage Check: Sum of (1 / Odds) for all outcomes < 1
Arbitrage Percentage = (1 - Sum of Inverses) × 100%
Individual Stake = Total Stake × (1 / Odds_i) / Sum of Inverses
Guaranteed Profit = Total Stake × Arbitrage Percentage / (1 - Arbitrage Percentage)
Frequently Asked Questions
What exactly is arbitrage betting?
Arbitrage betting — sometimes called surebetting — means covering every possible outcome of an event across different bookmakers so a profit is locked in no matter what happens. It works by tapping into the price gaps between books.
How do I spot an arbitrage opportunity?
Line up the odds from several bookmakers on the same event. When the sum of the inverse odds (1/odds) across all outcomes drops below 1, you’ve found an arb.
Is arbitrage betting legal?
In most places, yes — arbitrage betting is perfectly legal. The catch is that bookmakers may cap or shut down accounts they suspect of arbing, since it takes advantage of their pricing slip-ups.
What kind of profit margin can I expect?
Most arbs land in the 1-5% profit range. Bigger margins do show up, but they’re uncommon — usually right when odds first drop or when lines start shifting.