Arbitrage Calculator

Enter at least two outcomes in American odds. Add a third outcome for three-way markets like EPL match result. Total stake is required.

How this arbitrage calculator works

A betting arbitrage happens when the combined implied probability of all outcomes is below 100%. In a two-way market, that means the prices on both sides are strong enough that a correctly split stake can lock in a small profit no matter which side wins. In a three-way market like soccer 1X2, the same principle applies across all three outcomes.

This arb calculator converts each American price to decimal odds, adds the implied probabilities, and checks whether the combined total stays below 100%.

• If the combined implied probability is under 100%, there is a theoretical arbitrage opportunity.
• If it is 100% or higher, there is no true arb at those prices.
• Use the optional third outcome field for markets like Home / Draw / Away.

Add a total stake if you want the calculator to estimate how much to place on each side or outcome and what the guaranteed return looks like.

What is sports betting arbitrage?

Sports betting arbitrage means using different prices on all possible outcomes to create a small locked-in margin. In practice, bettors look for books that disagree enough on a two-way or three-way market that the total implied probability drops below 100%.

How to use this arb calculator

1. Enter the American odds for at least two outcomes.
2. Add a third outcome for markets like soccer match result if needed.
3. Add your planned total stake if you want a recommended split.
4. Check the combined implied probability.
5. If the total is under 100%, review the suggested stake split and estimated guaranteed profit.

Arbitrage calculator examples

In a two-way market, prices like +110 and +105 can create a small arb if the combined implied probability lands below 100%.

In a three-way market like EPL match result, you can enter prices for Home, Draw, and Away to test whether all three together create a valid theoretical arb.

Important limitations

An arb on paper is not always an arb in real life. Lines can move before all bets are placed, limits can prevent the correct stake split, and book rules can differ on overtime, voids, player props, or settlement timing.

This page is best used as a fast screening tool, not as a guarantee that a live market can actually be executed exactly as shown.

FAQ

What is an arbitrage calculator?
An arbitrage calculator checks whether multiple betting prices create a low-risk or guaranteed profit setup and estimates how to split the stake.

Can this calculator handle 3-way markets?
Yes. You can enter an optional third outcome for markets like soccer 1X2.

Does this guarantee profit?
Only in theory. Real execution still depends on timing, stake limits, and consistent market rules across books.

Can I use this with American odds?
Yes. This page is built for American odds inputs and converts them internally before checking the arb.

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