Calculate potential profits from surebets by inputting odds from different bookmakers.
Arbitrage Opportunity
N/A
Understanding Bet Arbitrage
Bet arbitrage, often referred to as "surebetting," is a strategy that exploits discrepancies in odds offered by different bookmakers for the same event. By placing bets on all possible outcomes across different bookmakers, an arbitrageur can guarantee a profit regardless of the event's actual outcome. This is possible because the combined implied probabilities from different bookmakers sometimes sum to less than 100%, indicating an overround that can be offset.
How Arbitrage Works
The core principle is to find situations where Bookmaker A offers good odds on Outcome X, and Bookmaker B offers good odds on Outcome Y (where X and Y are the only or all possible outcomes). If the odds are favorable enough, betting a specific amount on each outcome will result in the same total return, exceeding the total amount staked.
The Math Behind the Calculator
The calculator uses the following formulas:
Calculate the Decimal Sum (or Implied Probability Sum): For each outcome, convert the decimal odds to an implied probability by dividing 1 by the odds. Sum these probabilities.
For two outcomes: (1 / Odds1) + (1 / Odds2) For three outcomes: (1 / Odds1) + (1 / Odds2) + (1 / Odds3)
Check for Arbitrage: If the Decimal Sum is less than 1, an arbitrage opportunity exists.
Calculate Stake for Each Outcome: If an arbitrage opportunity exists, you can calculate how much to stake on each outcome to guarantee a profit. The formula for the stake on Outcome 'i' is:
Stake_i = (Total_Stake * (1 / Odds_i)) / Decimal_Sum Where Total_Stake is the amount you are willing to risk overall (e.g., 'Your Stake' input).
Calculate Guaranteed Profit/Return: The guaranteed return on any outcome is: Stake_i * Odds_i. This value should be the same for all outcomes.
The guaranteed profit is: Guaranteed_Return - Total_Stake.
Using the Calculator
Enter the total amount of money you wish to stake (e.g., 100 units).
Input the decimal odds offered by Bookmaker 1 for one outcome.
Input the decimal odds offered by Bookmaker 2 for another outcome (or all other outcomes).
If available, input odds from a third bookmaker for another outcome.
Click "Calculate Arbitrage".
The calculator will tell you if an arbitrage opportunity exists, the guaranteed profit percentage and amount, and the specific stakes required for each bookmaker to lock in that profit.
Important Considerations:
Odds Fluctuation: Odds can change rapidly. By the time you place your bets, the odds might have shifted, potentially eliminating the arbitrage or even creating a loss.
Stake Limits: Bookmakers may limit the maximum stake you can place, especially if they suspect arbitrage activity.
Bet Cancellation: Bookmakers reserve the right to cancel bets if they deem there was a "palpable error" in the odds offered.
Full Coverage: Ensure you are covering ALL possible outcomes of an event. For a two-team match (Team A vs. Team B), this means betting on Team A to win and Team B to win (or draw if applicable).
Decimal Odds: This calculator uses decimal odds (e.g., 2.00, 2.50).
Bet arbitrage can be a low-risk way to generate consistent returns, but it requires speed, attention to detail, and access to multiple bookmaker accounts.
function calculateArbitrage() {
var stake = parseFloat(document.getElementById("stake").value);
var odd1 = parseFloat(document.getElementById("odd1").value);
var odd2 = parseFloat(document.getElementById("odd2").value);
var odd3 = parseFloat(document.getElementById("odd3").value); // Optional
var resultDiv = document.getElementById("result");
var resultValueDiv = document.getElementById("result-value");
var resultMessageP = document.getElementById("result-message");
resultValueDiv.innerHTML = "N/A";
resultMessageP.innerHTML = "";
resultDiv.style.borderColor = "#28a745"; // Default to success green
if (isNaN(stake) || isNaN(odd1) || isNaN(odd2) || stake <= 0 || odd1 <= 1 || odd2 1) {
probabilities.push(1 / odd3);
oddsArray.push(odd3);
}
var decimalSum = 0;
for (var i = 0; i < probabilities.length; i++) {
decimalSum += probabilities[i];
}
if (decimalSum < 1) {
var guaranteedReturn = stake * (1 / decimalSum);
var guaranteedProfit = guaranteedReturn – stake;
var profitPercentage = (guaranteedProfit / stake) * 100;
var outputHtml = "Arbitrage opportunity found!";
outputHtml += "Total Stake: " + stake.toFixed(2) + "";
outputHtml += "Guaranteed Return: " + guaranteedReturn.toFixed(2) + "";
outputHtml += "Guaranteed Profit: " + guaranteedProfit.toFixed(2) + "";
outputHtml += "Profit Margin: " + profitPercentage.toFixed(2) + "%";
for (var i = 0; i < oddsArray.length; i++) {
var currentStake = (stake * (1 / oddsArray[i])) / decimalSum;
stakes.push(currentStake);
outputHtml += "Stake on Odds " + oddsArray[i] + ": " + currentStake.toFixed(2) + "";
}
resultValueDiv.innerHTML = profitPercentage.toFixed(2) + "%";
resultMessageP.innerHTML = outputHtml;
resultDiv.style.borderColor = "#28a745"; // Success Green
} else {
resultValueDiv.innerHTML = "No Arbitrage";
resultMessageP.innerHTML = "No arbitrage opportunity detected with these odds. The Decimal Sum is " + decimalSum.toFixed(4) + ", which is not less than 1.";
resultDiv.style.borderColor = "#ffc107"; // Warning Yellow
}
}