8-Way Arbitrage Calculator. Surebet

What is 8-Way Arbitrage?

8-Way Arbitrage is an advanced betting strategy where a bettor places wagers on all eight possible outcomes of a market, guaranteeing a profit no matter which outcome occurs. This betting method is typically found in markets with many possible results, such as specific sports events or niche betting markets.

How Does 8-Way Arbitrage Work?

Like other forms of arbitrage betting, the goal of 8-Way Arbitrage is to place bets on all outcomes in such a way that the total stake is less than the total return. The formula for calculating the arbitrage opportunity is:

(1 / Odds 1) + (1 / Odds 2) + (1 / Odds 3) + (1 / Odds 4) + (1 / Odds 5) + (1 / Odds 6) + (1 / Odds 7) + (1 / Odds 8) < 1

If the sum of the inverses of the odds for each outcome is less than 1, an arbitrage opportunity exists. This ensures a guaranteed profit no matter which of the eight outcomes occurs.

Example Calculation

Let’s say a specific event has eight possible outcomes, and the odds for each outcome are as follows:

Outcome 1 → 3.00
Outcome 2 → 3.50
Outcome 3 → 4.00
Outcome 4 → 4.50
Outcome 5 → 5.00
Outcome 6 → 5.50
Outcome 7 → 6.00
Outcome 8 → 6.50

Step 1: Check for Arbitrage

(1 / 3.00) + (1 / 3.50) + (1 / 4.00) + (1 / 4.50) + (1 / 5.00) + (1 / 5.50) + (1 / 6.00) + (1 / 6.50) = 0.957 → Arbitrage opportunity exists.

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

Outcome 1: $33.33
Outcome 2: $28.57
Outcome 3: $25.00
Outcome 4: $22.22
Outcome 5: $20.00
Outcome 6: $18.18
Outcome 7: $16.67
Outcome 8: $15.38

Step 3: Calculate Profit

No matter which outcome occurs, the bettor will receive a return of around $103-$104, resulting in a $3-$4 profit.

Pros & Risks

✅ Pros:

Covers all eight possible outcomes, ensuring a guaranteed profit.
Potential for higher profits compared to simpler arbitrage strategies.
Allows bettors to take advantage of discrepancies in odds between different bookmakers.

⚠️ Risks:

Requires significant capital to cover all eight outcomes.
Odds may change quickly, making it difficult to lock in the arbitrage opportunity.
Bookmakers may limit accounts involved in frequent arbitrage betting.