Arbitrage Calculator
Find the stake split that locks in a guaranteed profit across both sides.
Enter the best available odds on each side of a market and your total stake. The calculator tells you whether a risk-free arbitrage exists, exactly how to split your money, and the profit you lock in either way.
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Everything behind the numbers
What is arbitrage betting?
Arbitrage, or arbing, means backing every outcome of a market at prices that guarantee a profit no matter who wins. It happens when two books disagree enough that the combined implied probability drops below 100%. You are not predicting anything; you are exploiting a pricing gap.
How to know if an arb exists
Convert both sides to decimal odds and add their inverses (1/odds). If the total is below 1.0, an arbitrage exists, and the profit margin is roughly 1 divided by that total, minus 1. The calculator flags it and shows the return instantly.
How to split your stakes
To lock the profit, stake each side in proportion to its inverse odds so both outcomes return the same amount. The calculator does the division for you, so each side pays back the same total no matter the result.
Why real edge beats chasing arbs
True arbs are rare, small, and quickly limited by sportsbooks. The more durable edge is simply getting a better price in the first place. On BettorEdge you trade at market-fair odds with no house margin, which is where most of the value actually lives.
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Frequently asked questions
How does an arbitrage calculator work?+
It checks whether the combined implied probability of both sides is under 100%. If it is, the calculator shows the stake split that returns the same amount on either outcome, locking in profit.
How do I split stakes for an arbitrage bet?+
Stake each side in proportion to its inverse decimal odds. The calculator computes the exact amounts so both outcomes pay back equally.
Is arbitrage betting legal?+
Arbitrage betting is legal, but sportsbooks dislike it and often limit accounts that do it. Arbs are also usually small and short-lived.
Is arbing worth it?+
It can be, but the margins are thin and books limit you fast. Getting consistently better prices, like a no-vig marketplace, tends to be more sustainable than chasing arbs.