What is a 2-way arbitrage bet?

A 2-way arb covers a market with exactly two possible outcomes across two bookmakers, so that whichever result occurs you make a profit.

Which markets are 2-way?

Two-outcome markets such as tennis match winner, Over/Under goals, points spreads, and any moneyline without a draw.

How do I know the two odds give a surebet?

Add 1/odd1 + 1/odd2. If the total is below 1, you have a guaranteed profit. The calculator shows this instantly.

2-Way Arbitrage Calculator | Surebet Calculator 2 Way

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Ways:

Enter the odds and your amount — stakes and profits update in real time. Tip: use the optional note field next to each row to label the outcome (e.g. a team, 1X, Over 2.5 or a score).

Profitability = 0%

	Odds	Bet	Profit

2-way arbitrage explained

A 2-way arbitrage — the most common type of surebet — covers a market with two possible results. Think tennis (Player A or Player B), Over/Under goals, or a points handicap. When one bookmaker prices one side generously and another bookmaker prices the opposite side generously, you can back both and lock in profit before a ball is even played.

Worked example

Say Bookmaker A offers 2.10 on Player 1 and Bookmaker B offers 2.10 on Player 2. The sum of inverses is 1/2.10 + 1/2.10 = 0.952 — below 1, so it is a surebet. Enter both odds above with a €100 stake and the calculator splits it into €50 / €50, returning a guaranteed profit on either result.

Frequently asked questions

What is a 2-way arbitrage bet?: A 2-way arb covers a market with exactly two possible outcomes across two bookmakers, so that whichever result occurs you make a profit.
Which markets are 2-way?: Two-outcome markets such as tennis match winner, Over/Under goals, points spreads, and any moneyline without a draw.
How do I know the two odds give a surebet?: Add 1/odd1 + 1/odd2. If the total is below 1, you have a guaranteed profit. The calculator shows this instantly.