4-Way Arbitrage Calculator. Surebet

What is 4-Way Arbitrage?

4-Way Arbitrage is a betting strategy where you place bets on all four possible outcomes in specific sports or events, ensuring a profit regardless of the result. This method is commonly used in sports like tennis (where a set bet includes four options) or in certain betting markets with extended outcomes.

How Does It Work?

Arbitrage exists if:

(1 / Odds 1) + (1 / Odds 2) + (1 / Odds 3) + (1 / Odds 4) < 1

If the total is below 1, a risk-free betting opportunity arises.

Example Calculation

For a tennis set bet, the odds from different bookmakers are:

Player A wins 2-0 → 3.00
Player A wins 2-1 → 4.50
Player B wins 2-0 → 3.20
Player B wins 2-1 → 4.40

Step 1: Check for Arbitrage

(1 / 3.00) + (1 / 4.50) + (1 / 3.20) + (1 / 4.40) = 0.972 → Arbitrage exists.

Step 2: Calculate Stakes (for a $100 total bet)

Player A 2-0: $32.43
Player A 2-1: $21.62
Player B 2-0: $31.25
Player B 2-1: $22.70

Step 3: Calculate Profit

Any outcome gives a return of around $102-$103, ensuring a $2-$3 profit.

Pros & Risks

✅ Pros:

Covers all possible outcomes.
Higher profit margins than 2- or 3-way arbitrage.

⚠️ Risks:

Odds change quickly.
Harder to find than 3-way arbitrage.
Bookmakers may limit successful arbitrage players.