Sports Arbitrage Betting Calculator: 2-way, 3-way, 4-way

The two arbitrage betting calculators below are capable of calculating arbitrage bets with many outcomes, including the most common 2-way, 3-way, and 4-way sure bets.

The first arb calculator is only for 2 outcomes, but you can lock the outcome that you need with a specific stake. In this case, the calculator displays the total stake and the stake you should place on the other outcome.

Arbitrage calculator with multiple outcomes

Did you come for the Excel arb formula/file and are not interested in more valuable tips about sure betting?

Here you go:

How does the Arbitrage Calculator work?

An arbitrage betting calculator is capable of comparing the odds of two or more outcomes and calculating the possible profit edge if the bettor would like to place bets on both outcomes.

A sure bet calculator is also capable of advising the stakes you need to place on each outcome based on your total stake and the odds.

This sports arbitrage betting calculator is designed to display the possible profits in percentages and the ROI (return on investment) you can achieve with the odds you found and believe to be good for a sure betting opportunity.

What is a sure bet calculator used for?

A sure bet calculator is the best and most accurate tool to determine or calculate if there is a potential big enough odds discrepancy between betting sites.

Arbitrage betting or sure betting is a risk-free approach to sports betting that can generate a guaranteed profit if the bets are placed on the right odds with the right stakes.

This strategy requires bettors to place proportional bets on every possible outcome of a betting market.

Each bet should be placed at a different market with the right-sized stakes displayed by an arbitrage calculator.

If each step is completed successfully no matter the outcome, you will generate a guaranteed profit by winning at least 1 outcome and having a smaller loss at the other outcomes.

An arbitrage bet profit is calculated: Total winnings – total stakes.

If you enter the odds for any two-way or three-way, or even more outcome and the total stakes in the Arbitrage Calculator above, it will calculate if there is an arbitrage opportunity and tell you how much you need to stake on each outcome in order to guarantee a profit.

Make sure you check the article on how to find arbitrage bets. It includes many helpful tips both for beginners and advanced arbers.

Calculator Features

• You can insert the odds of the desired sure bet
• You need to insert the total stake in order to be able to fire the arbitrage calculator
• You hit Calculate, and the sure bet calculator displays the odds you need to place on each outcome
• You can add additional outcomes if you want to place sure bets on a three-way arb or with more outcome
• If you made a mistake you can hit reset and the arbitrage calculator restarts and sets itself to its default settings

Two-way arbitrage betting calculator

Once you’ve identified an arbitrage opportunity, the next step is to calculate the optimal stakes you should place on each outcome.

The stake formula for this is:

Stake (Outcome) = (Total Investment * Implied Probability (Outcome)) / Total Implied Probability

Example:

Continuing with our tennis match example, let’s assume you want to invest $1000 in this arbitrage bet:

1. Calculate the total implied probability for Bookmaker A: 0.5263 (Player 1) + 0.4545 (Player 2) = 0.9808
2. Calculate the stake for each outcome:

2. Player 1: (1000 * 0.5263) / 0.9808 = $536.51
3. Player 2: (1000 * 0.4545) / 0.9808 = $463.49

So, you would place a $536.51 bet on Player 1 with Bookmaker A and a $463.49 bet on Player 2 with Bookmaker A.

To determine the profit, simply multiply the stake by the odds and subtract the total investment:

• If Player 1 wins: (536.51 * 1.90) – 1000 = $18.36
• If Player 2 wins: (463.49 * 2.20) – 1000 = $18.68

Regardless of the outcome, you’re guaranteed a profit of around $18.

Examples of the arbing Formula in Action

Let’s look at an example of the arbitrage betting formula in action.

Suppose there is a tennis match between Rafael Nadal and Novak Djokovic, and two bookmakers offer the following odds:

Bookmaker A: Nadal to win 1.80, Djokovic to win 2.10 Bookmaker B: Nadal to win 1.90, Djokovic to win 2.00

To determine if an arbitrage opportunity exists, we need to calculate the implied probabilities of each outcome:

Implied probability of Nadal winning with Bookmaker A = 1 / 1.80 = 55.56%

Implied probability of Djokovic winning with Bookmaker A = 1 / 2.10 = 47.62%

Implied probability of Nadal winning with Bookmaker B = 1 / 1.90 = 52.63%

Implied probability of Djokovic winning with Bookmaker B = 1 / 2.00 = 50.00%

The sum of the implied probabilities is 205.81%, which is greater than 100%.

Therefore, an arbitrage opportunity exists.

To determine the bet sizes for each outcome, we need to allocate our total stake in proportion to the implied probabilities:

Total stake = $100 Bet size for Nadal to win with Bookmaker A = $100 x (55.56% / 205.81%) = $27.03

Bet size for Djokovic to win with Bookmaker A = $100 x (47.62% / 205.81%) = $23.38

Bet size for Nadal to win with Bookmaker B = $100 x (52.63% / 205.81%) = $25.61

Bet size for Djokovic to win with Bookmaker B = $100 x (50.00% / 205.81%) = $24.97

The total bet size is $100, and the potential profit is $4.55, which is guaranteed regardless of the outcome of the match.

Three-Way Arbitrage Betting Calculator in action

Three-way arbitrage bets are more complex, as they involve three possible outcomes.

The process for identifying opportunities and calculating stakes, however, remains similar.

Example:

Suppose we have two bookmakers offering odds on a soccer match with three possible outcomes: Team A win, Team B win, or Draw:

• Bookmaker A: Team A – 2.50, Team B – 3.00, Draw – 3.40
• Bookmaker B: Team A – 2.40, Team B – 2.90, Draw – 3.50

First, convert the odds to their implied probabilities:

• Team A (Bookmaker A): 1 / 2.50 = 0.4000
• Team B (Bookmaker A): 1 / 3.00 = 0.3333
• Draw (Bookmaker A): 1 / 3.40 = 0.2941
• Team A (Bookmaker B): 1 / 2.40 = 0.4167
• Team B (Bookmaker B): 1 / 2.90 = 0.3448
• Draw (Bookmaker B): 1 / 3.50 = 0.2857

Next, add the implied probabilities together for each bookmaker:

• Bookmaker A: 0.4000 + 0.3333 + 0.2941 = 1.0274
• Bookmaker B: 0.4167 + 0.3448 + 0.2857 = 1.0472

In this case, no arbitrage opportunities exist, as the sum of the implied probabilities is greater than 1 for both bookmakers.

Arbitrage betting formula excel

You can download it below (or build it for yourself from the information provided):

Here’s a simple Excel-based arbitrage betting calculator that you can use for two-way and three-way bets. Follow these steps to create your own calculator:

1. Open a new Excel workbook.
2. In cells A1 to C1, enter the following headers: Outcome, Odds, and Implied Probability.
3. In cells A2 to A4, enter the possible outcomes: Outcome 1, Outcome 2, and Outcome 3 (for three-way bets; otherwise, leave A4 blank).
4. In cells B2 to B4, input the best odds you’ve found for each outcome.
5. In cells C2 to C4, enter the following formula to calculate the implied probability for each outcome:

=1/B2/B2

Copy this formula down to cells C3 and C4 if needed.

6. In cell C5, enter the following formula to calculate the total implied probability:

=SUM(C2:C4)

7. In cells E1 and E2, enter the headers Total Investment and Total Implied Probability, respectively.
8. In cell F1, input your desired total investment amount.
9. In cell F2, enter the following formula to reference the total implied probability from cell C5:

=C5

10. In cells H1 to J1, enter the following headers: Outcome, Stake, and Potential Return.
11. In cells H2 to H4, enter the possible outcomes: Outcome 1, Outcome 2, and Outcome 3 (for three-way bets; otherwise, leave H4 blank).
12. In cells I2 to I4, enter the following formula to calculate the optimal stake for each outcome:

=(F1 * C2) / F2

Copy this formula down to cells I3 and I4 if needed.

13. In cells J2 to J4, enter the following formula to calculate the potential return for each outcome:

=I2 * B2

Copy this formula down to cells J3 and J4 if needed.

14. In cell J5, enter the following formula to calculate the guaranteed profit:

=MIN(J2:J4) – F1

Your Excel-based arbitrage betting calculation formula is now ready to use. Input the best odds you’ve found for each outcome in cells B2 to B4, and the calculator will determine the optimal stakes, potential returns, and guaranteed profit for your arbitrage bet.

Remember that this calculator assumes you’ve already identified an arbitrage opportunity with a total implied probability of less than 1.

While this arbitrage calculator comes in handy many times, the integrated calculator of each arbitrage finder mentioned on this site has more features and allows you a faster process of finding out the right stakes for your bets.

If you start learning about value betting, make sure you check my positive EV calculator. It’s different from the ones you can find on other sites.

You truly can calculate the + Expected Value of a bet with the help of it.