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Roulette Number Calculator

Jan 20, 2026

About this app

A fun and colorful roulette number calculator that helps players find probabilities and outcomes.

Roulette Number Calculator Roulette Number Calculator Enter Your Bet Amount ($): Choose a Number (0-36): Spin the Wheel!

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Source

                    <html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1">

<title>Roulette Number Calculator</title>
<meta name="description" content="A fun and colorful roulette number calculator that helps players find probabilities and outcomes.">
<meta name="keywords" content="Roulette, Casino, Betting, Numbers, Probability, Calculator">

<!-- Libraries -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.min.js" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6.6.0/css/fontawesome.min.css" crossorigin="anonymous">

<script type="text/javascript">
try {
document.addEventListener("DOMContentLoaded", function() {
$('#calculate-btn').on('click', function() {
let winnings = 0;
const betAmount = parseFloat($('#bet-amount').val());
const chosenNumber = parseInt($('#chosen-number').val());

if (isNaN(betAmount) || isNaN(chosenNumber) || chosenNumber < 0 || chosenNumber > 36) {
$('#result').html('<div class="alert alert-danger">Please enter a valid bet amount and number (0-36).</div>');
return;
}

const wheelNumbers = [...Array(37).keys()]; // Numbers 0-36
const randomNumber = wheelNumbers[Math.floor(Math.random() * wheelNumbers.length)];

if (randomNumber === chosenNumber) {
winnings = betAmount * 35; // Standard payout for a specific number bet
$('#result').html(`<div class="alert alert-success">Congratulations! The ball landed on ${randomNumber}. You win $${winnings}!</div>`);
} else {
$('#result').html(`<div class="alert alert-warning">The ball landed on ${randomNumber}. You lose your bet of $${betAmount}.</div>`);
}
});
});
} catch (error) {
throw error;
}
</script>

<style>
body {
background: linear-gradient(to right, #f3e5f5, #e1bee7);
color: #4a148c;
}
#main-container {
padding: 2em;
border-radius: 10px;
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
background-color: #ffffff;
margin-top: 50px;
}
.spin-button {
background: #4caf50;
color: white;
border: none;
}
.spin-button:hover {
background: #388e3c;
}
.form-control {
margin-bottom: 1em;
}
</style>
</head>
<body>
<div id="main-container" class="container">
<h1 class="text-center">Roulette Number Calculator</h1>
<div class="mb-3">
<label for="bet-amount" class="form-label">Enter Your Bet Amount ($):</label>
<input type="number" id="bet-amount" class="form-control" placeholder="e.g. 10" />
</div>
<div class="mb-3">
<label for="chosen-number" class="form-label">Choose a Number (0-36):</label>
<input type="number" id="chosen-number" class="form-control" min="0" max="36" placeholder="e.g. 17" />
</div>
<button id="calculate-btn" class="btn spin-button btn-block">Spin the Wheel!</button>
<div id="result" class="mt-4"></div>
</div>
</body>
</html>