#betting-odds-calculator-wp {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 20px auto;
padding: 25px;
border: 1px solid #e1e4e8;
border-radius: 12px;
background-color: #ffffff;
color: #24292e;
box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
.bet-calc-header {
text-align: center;
margin-bottom: 30px;
}
.bet-calc-header h2 {
margin: 0;
color: #1a73e8;
font-size: 28px;
}
.bet-input-row {
display: flex;
flex-wrap: wrap;
gap: 20px;
margin-bottom: 20px;
}
.bet-input-group {
flex: 1;
min-width: 200px;
}
.bet-input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
font-size: 14px;
}
.bet-input-group select, .bet-input-group input {
width: 100%;
padding: 12px;
border: 2px solid #ddd;
border-radius: 8px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.3s;
}
.bet-input-group input:focus {
border-color: #1a73e8;
outline: none;
}
.bet-btn-calculate {
width: 100%;
background-color: #1a73e8;
color: white;
border: none;
padding: 15px;
border-radius: 8px;
font-size: 18px;
font-weight: bold;
cursor: pointer;
margin-top: 10px;
transition: background-color 0.2s;
}
.bet-btn-calculate:hover {
background-color: #1557b0;
}
.bet-results {
margin-top: 30px;
padding: 20px;
background-color: #f8f9fa;
border-radius: 10px;
display: none;
}
.bet-results-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 15px;
}
.result-item {
padding: 10px;
border-bottom: 1px solid #eee;
}
.result-label {
font-size: 13px;
color: #666;
text-transform: uppercase;
letter-spacing: 0.5px;
}
.result-value {
font-size: 20px;
font-weight: bold;
color: #2c3e50;
}
.payout-highlight {
background-color: #e8f0fe;
border-radius: 8px;
padding: 15px;
grid-column: span 2;
text-align: center;
}
.payout-highlight .result-value {
color: #1a73e8;
font-size: 28px;
}
.bet-article {
margin-top: 40px;
line-height: 1.6;
color: #444;
border-top: 1px solid #eee;
padding-top: 30px;
}
.bet-article h3 {
color: #222;
margin-bottom: 15px;
}
.bet-article p {
margin-bottom: 15px;
}
.bet-article ul {
margin-bottom: 20px;
padding-left: 20px;
}
.bet-error {
color: #d93025;
font-size: 14px;
margin-top: 10px;
display: none;
}
function gcd(a, b) {
return b ? gcd(b, a % b) : a;
}
function toFraction(decimal) {
var val = decimal – 1;
if (val <= 0) return "0/1";
var len = val.toString().length – 2;
var denominator = Math.pow(10, len);
var numerator = Math.floor(val * denominator);
var common = gcd(numerator, denominator);
return (numerator / common) + "/" + (denominator / common);
}
function calculateBettingResults() {
var format = document.getElementById("oddsFormat").value;
var oddsInput = document.getElementById("oddsValue").value.trim();
var stake = parseFloat(document.getElementById("betStake").value);
var errorDiv = document.getElementById("betError");
var resultsDiv = document.getElementById("betResults");
errorDiv.style.display = "none";
if (!oddsInput || isNaN(stake) || stake = 100) {
decimalOdds = (am / 100) + 1;
} else if (am <= -100) {
decimalOdds = (100 / Math.abs(am)) + 1;
} else {
throw "Invalid American Odds";
}
} else if (format === "decimal") {
decimalOdds = parseFloat(oddsInput);
if (decimalOdds <= 1) throw "Invalid Decimal Odds";
} else if (format === "fractional") {
if (oddsInput.indexOf('/') !== -1) {
var parts = oddsInput.split('/');
var num = parseFloat(parts[0]);
var den = parseFloat(parts[1]);
decimalOdds = (num / den) + 1;
} else {
decimalOdds = parseFloat(oddsInput) + 1;
}
if (isNaN(decimalOdds) || decimalOdds <= 1) throw "Invalid Fractional Odds";
} else if (format === "implied") {
var prob = parseFloat(oddsInput);
if (prob = 100) throw "Invalid Probability";
decimalOdds = 100 / prob;
}
} catch (e) {
errorDiv.innerText = "Error: " + e;
errorDiv.style.display = "block";
resultsDiv.style.display = "none";
return;
}
if (isNaN(decimalOdds) || decimalOdds === Infinity) {
errorDiv.style.display = "block";
resultsDiv.style.display = "none";
return;
}
// Calculations
var profit = stake * (decimalOdds – 1);
var totalReturn = stake + profit;
var impliedProb = (1 / decimalOdds) * 100;
var americanDisplay = "";
if (decimalOdds >= 2.0) {
americanDisplay = "+" + Math.round((decimalOdds – 1) * 100);
} else {
americanDisplay = Math.round(-100 / (decimalOdds – 1));
}
// Simple Fractional approximation for common odds
var fractionalDisplay = "";
var d = decimalOdds – 1;
if (Math.abs(d – 1.5) < 0.01) fractional alt = "3/2";
// For general use, we'll use the simplified decimal to fraction logic
fractionalDisplay = toFraction(decimalOdds);
// Display
document.getElementById("resTotalReturn").innerText = totalReturn.toFixed(2);
document.getElementById("resProfit").innerText = profit.toFixed(2);
document.getElementById("resImplied").innerText = impliedProb.toFixed(2) + "%";
document.getElementById("resAmerican").innerText = americanDisplay;
document.getElementById("resDecimal").innerText = decimalOdds.toFixed(2);
document.getElementById("resFractional").innerText = fractionalDisplay;
resultsDiv.style.display = "block";
}
Betting Odds Calculator & Converter
Convert American, Decimal, Fractional odds and calculate potential profits.
American (+200 / -150)
Decimal (3.00)
Fractional (2/1)
Implied Probability (%)
Please enter valid odds and stake.
Total Payout (Return)
0.00
Potential Profit
0.00
Implied Probability
0.00%
American Odds
0
Decimal Odds
0.00
Fractional Odds
0/1
How to Understand Betting Odds
Betting odds represent the probability of an event occurring and determine how much profit you will make if your wager is successful. There are three primary formats used globally:
1. American Odds (Moneyline)
Popular in the United States, these odds center around a base of 100.
- Positive Numbers (+): Indicates how much profit you make on a 100 unit stake. For example, +200 means you win 200 for every 100 bet.
- Negative Numbers (-): Indicates how much you need to stake to make a 100 profit. For example, -110 means you must bet 110 to win 100.
2. Decimal Odds
Common in Europe, Canada, and Australia. This format represents the total payout (stake + profit) for every 1 unit wagered. Calculation: Stake × Decimal Odds = Total Payout.
3. Fractional Odds
Traditional in the UK and Ireland. The first number (numerator) is the potential profit, while the second number (denominator) is the stake required. Odds of 5/1 mean you win 5 units for every 1 unit staked.
Implied Probability
Implied probability is the conversion of betting odds into a percentage. It shows what the bookmaker thinks the chances of that outcome are, plus their built-in margin (the "vig" or "juice"). Knowing the implied probability helps bettors find "value" – where the actual chance of an event happening is higher than the bookmaker's odds suggest.
Practical Example
If you bet 50 on a team with +150 American odds:
- Decimal conversion: 2.50
- Fractional conversion: 6/4 (or 1.5/1)
- Implied Probability: 40%
- Profit: 75
- Total Payout: 125