Parlay Bet Calculator
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #f8f9fa;
color: #333;
margin: 0;
padding: 20px;
display: flex;
flex-direction: column;
align-items: center;
}
.parlay-calc-container {
background-color: #ffffff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
width: 100%;
max-width: 600px;
margin-bottom: 30px;
}
h1, h2 {
color: #004a99;
text-align: center;
margin-bottom: 20px;
}
.input-group {
margin-bottom: 20px;
display: flex;
flex-direction: column;
align-items: flex-start;
}
.input-group label {
margin-bottom: 8px;
font-weight: bold;
color: #004a99;
}
.input-group input[type="number"],
.input-group input[type="text"] {
width: calc(100% – 22px); /* Account for padding and border */
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1rem;
transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}
.input-group input[type="number"]:focus,
.input-group input[type="text"]:focus {
border-color: #004a99;
box-shadow: 0 0 0 0.2rem rgba(0, 74, 153, 0.25);
outline: none;
}
.leg-inputs .input-group {
border: 1px dashed #004a99;
padding: 15px;
border-radius: 5px;
margin-bottom: 15px;
background-color: #eef7ff;
}
button {
background-color: #28a745;
color: white;
padding: 12px 25px;
border: none;
border-radius: 5px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.2s ease-in-out;
display: block;
width: 100%;
margin-top: 10px;
}
button:hover {
background-color: #218838;
}
#result {
background-color: #d4edda;
color: #155724;
padding: 20px;
border-radius: 8px;
border: 1px solid #c3e6cb;
text-align: center;
font-size: 1.5rem;
font-weight: bold;
margin-top: 20px;
}
#result span {
color: #004a99;
}
.article-section {
background-color: #ffffff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
width: 100%;
max-width: 600px;
text-align: justify;
line-height: 1.6;
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.article-section h2 {
margin-top: 0;
color: #004a99;
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.article-section h3 {
color: #004a99;
margin-top: 25px;
margin-bottom: 10px;
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.article-section code {
background-color: #eef7ff;
padding: 2px 5px;
border-radius: 3px;
}
Parlay Bet Calculator
Odds Type:
Decimal
Fractional
American
Calculate Parlay Payout
Potential Payout: $0.00 $0.00
Understanding Parlay Bets and the Calculator
A parlay bet, often referred to as an accumulator or multi-bet, is a single wager that links together two or more individual bets. For the parlay to win, all of the individual bets (or "legs") within the parlay must win. The significant advantage of a parlay is the dramatically increased payout compared to placing each bet individually. This is because the winnings from each leg are reinvested into the next leg, creating a compounding effect.
How Parlay Payouts are Calculated
The core of a parlay bet is the multiplication of odds. The payout is determined by taking the initial stake and multiplying it by the odds of each individual leg. The specific method of calculation depends on the odds format:
1. Decimal Odds
This is the most straightforward format for parlay calculations. To find the total payout, you simply multiply the stake by the decimal odds of each leg consecutively.
Formula: Payout = Stake × DecimalOddsLeg1 × DecimalOddsLeg2 × ... × DecimalOddsLegN
Profit = Payout - Stake
2. Fractional Odds
Fractional odds (e.g., 3/1, 5/2) represent the profit relative to the stake. To use them in a parlay, they are typically converted to decimal odds first or calculated iteratively.
Conversion to Decimal: Decimal Odds = (Numerator / Denominator) + 1
Once converted, the calculation proceeds as with decimal odds.
3. American Odds
American odds can be positive (+) or negative (-).
Positive Odds (+): Represent the profit on a $100 bet (e.g., +200 means you win $200 on a $100 bet).Negative Odds (-): Represent the amount you must bet to win $100 (e.g., -150 means you must bet $150 to win $100).
Conversion to Decimal:
If odds are positive (+): Decimal Odds = (American Odds / 100) + 1
If odds are negative (-): Decimal Odds = (100 / |American Odds|) + 1
After conversion, the parlay calculation follows the decimal odds method.
Using the Parlay Bet Calculator
Our calculator simplifies this process:
Stake: Enter the total amount you wish to bet.Odds Type: Select whether your odds are in Decimal, Fractional, or American format.Odds Input: Depending on your selected odds type, enter the odds for each leg of your parlay. The calculator will handle the conversions internally.Calculate: Click the button to see your potential total payout and your net profit (total payout minus your initial stake).
Example Calculation
Let's consider a 3-leg parlay with a stake of $25 using Decimal Odds:
Leg 1: Decimal Odds = 2.00
Leg 2: Decimal Odds = 3.00
Leg 3: Decimal Odds = 1.50
Calculation:
Total Payout = $25 × 2.00 × 3.00 × 1.50 = $25 × 9.00 = $225.00
Profit = $225.00 - $25.00 = $200.00
The calculator will show a potential payout of $225.00 and a profit of $200.00.
When to Use a Parlay Calculator
A parlay calculator is essential for bettors who:
Want to quickly understand the potential return of a multi-leg bet before placing it.
Are comparing different parlay combinations.
Are working with different odds formats (Decimal, Fractional, American) and need a unified way to calculate payouts.
Want to manage their bankroll effectively by knowing the exact potential outcome of their wagers.
By using this tool, you can make more informed betting decisions and appreciate the amplified risk and reward associated with parlay wagers.
function convertToDecimal(odds, type) {
if (type === 'decimal') {
var oddsNum = parseFloat(odds);
if (isNaN(oddsNum) || oddsNum = 0) { // 0/1 is valid as 1.0 decimal
return simpleOdds + 1;
}
}
return null;
} else if (type === 'american') {
var oddsNum = parseInt(odds);
if (isNaN(oddsNum)) return null;
if (oddsNum > 0) {
return (oddsNum / 100) + 1;
} else if (oddsNum 0 ? document.querySelectorAll('.leg-odds-input').length : 2; // Default to 2 if none exist yet
for (var i = 1; i <= numLegs; i++) {
var inputGroup = document.createElement('div');
inputGroup.className = 'input-group leg-odds-input'; // Add class for easier selection
var label = document.createElement('label');
var input = document.createElement('input');
if (oddsType === 'decimal') {
label.textContent = 'Leg ' + i + ' Decimal Odds:';
input.type = 'number';
input.step = '0.01';
input.placeholder = 'e.g., 1.50';
} else if (oddsType === 'fractional') {
label.textContent = 'Leg ' + i + ' Fractional Odds:';
input.type = 'text';
input.placeholder = 'e.g., 1/2 or 3/2 or 2';
} else { // american
label.textContent = 'Leg ' + i + ' American Odds:';
input.type = 'number';
input.placeholder = 'e.g., -150 or +200';
}
input.id = 'leg' + i + 'Odds';
input.min = (oddsType === 'decimal' || oddsType === 'fractional') ? '1' : null; // Minimum for decimal/fractional is 1.0
input.className = 'odds-input'; // Class for accessing all odds inputs
inputGroup.appendChild(label);
inputGroup.appendChild(input);
dynamicInputsDiv.appendChild(inputGroup);
}
}
function addLeg() {
var container = document.getElementById('legInputsContainer');
var currentLegCount = container.querySelectorAll('.leg-odds-input').length;
var newLegNumber = currentLegCount + 1;
var oddsType = document.getElementById('oddsType').value;
var inputGroup = document.createElement('div');
inputGroup.className = 'input-group leg-odds-input'; // Add class for easier selection
var label = document.createElement('label');
var input = document.createElement('input');
if (oddsType === 'decimal') {
label.textContent = 'Leg ' + newLegNumber + ' Decimal Odds:';
input.type = 'number';
input.step = '0.01';
input.placeholder = 'e.g., 1.50';
} else if (oddsType === 'fractional') {
label.textContent = 'Leg ' + newLegNumber + ' Fractional Odds:';
input.type = 'text';
input.placeholder = 'e.g., 1/2 or 3/2 or 2';
} else { // american
label.textContent = 'Leg ' + newLegNumber + ' American Odds:';
input.type = 'number';
input.placeholder = 'e.g., -150 or +200';
}
input.id = 'leg' + newLegNumber + 'Odds';
input.min = (oddsType === 'decimal' || oddsType === 'fractional') ? '1' : null;
input.className = 'odds-input'; // Class for accessing all odds inputs
inputGroup.appendChild(label);
inputGroup.appendChild(input);
container.insertBefore(inputGroup, document.querySelector('button')); // Insert before the button
}
function calculateParlay() {
var stake = parseFloat(document.getElementById('stake').value);
var oddsType = document.getElementById('oddsType').value;
var oddsInputs = document.querySelectorAll('.odds-input');
var decimalOddsArray = [];
var validInputs = true;
if (isNaN(stake) || stake <= 0) {
alert('Please enter a valid stake amount.');
return;
}
for (var i = 0; i < oddsInputs.length; i++) {
var oddsValue = oddsInputs[i].value;
var decimalOdds = convertToDecimal(oddsValue, oddsType);
if (decimalOdds === null || decimalOdds = 1.0
alert('Please enter valid odds for Leg ' + (i + 1) + '. Minimum decimal odds are 1.0.');
validInputs = false;
break;
}
decimalOddsArray.push(decimalOdds);
}
if (!validInputs) {
return;
}
if (decimalOddsArray.length < 2) {
alert('Please add at least two legs to your parlay.');
return;
}
var totalPayout = stake;
for (var j = 0; j < decimalOddsArray.length; j++) {
totalPayout *= decimalOddsArray[j];
}
var profit = totalPayout – stake;
document.querySelector('#result span:first-child').textContent = '$' + totalPayout.toFixed(2);
document.querySelector('#result span:last-child').textContent = '$' + profit.toFixed(2);
}
// Initial setup on page load
document.addEventListener('DOMContentLoaded', function() {
updateOddsLabels(); // Initialize with default inputs
// Add a button to dynamically add legs
var addLegButton = document.createElement('button');
addLegButton.textContent = 'Add Leg';
addLegButton.style.backgroundColor = '#007bff'; // A different color to distinguish
addLegButton.style.marginTop = '15px';
addLegButton.style.fontSize = '0.9rem';
addLegButton.style.padding = '8px 15px';
addLegButton.onclick = addLeg;
var container = document.getElementById('legInputsContainer');
var firstButton = container.querySelector('button');
if(firstButton) {
container.insertBefore(addLegButton, firstButton);
} else {
container.appendChild(addLegButton); // Fallback if button doesn't exist
}
});