diff --git a/Domains/Frontend/MiniProjects/BMICalculator/README.md b/Domains/Frontend/MiniProjects/BMICalculator/README.md
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+# BMI Calculator
+**Contributor:** Aaditya-2407
+
+## Description
+A web app that calculates a user's Body Mass Index (BMI) based on their height (cm) and weight (kg).
+
+## Tech Stack
+- HTML
+- CSS
+- JavaScript (Vanilla)
+
+## How to Run
+1. Open the `index.html` file in your web browser.
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diff --git a/Domains/Frontend/MiniProjects/BMICalculator/index.html b/Domains/Frontend/MiniProjects/BMICalculator/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>BMI Calculator</title>
+    <link rel="stylesheet" href="style.css">
+</head>
+<body>
+    <div class="bmi-container">
+        <h1>BMI Calculator</h1>
+        <div class="input-group">
+            <label for="height">Height (in cm):</label>
+            <input type="number" id="height" placeholder="Enter your height">
+        </div>
+        <div class="input-group">
+            <label for="weight">Weight (in kg):</label>
+            <input type="number" id="weight" placeholder="Enter your weight">
+        </div>
+        <button id="calculate-btn">Calculate</button>
+        <div id="result-container" class="result">
+            </div>
+    </div>
+    <script src="script.js"></script>
+</body>
+</html>
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diff --git a/Domains/Frontend/MiniProjects/BMICalculator/script.js b/Domains/Frontend/MiniProjects/BMICalculator/script.js
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+const heightInput = document.getElementById('height');
+const weightInput = document.getElementById('weight');
+const calculateBtn = document.getElementById('calculate-btn');
+const resultContainer = document.getElementById('result-container');
+
+function calculateBMI() {
+    const height = parseFloat(heightInput.value);
+    const weight = parseFloat(weightInput.value);
+
+    if (isNaN(height) || isNaN(weight) || height <= 0 || weight <= 0) {
+        resultContainer.innerHTML = 'Please enter valid height and weight.';
+        return;
+    }
+
+    // BMI Calculation: weight (kg) / (height (m))^2
+    const heightInMeters = height / 100;
+    const bmi = weight / (heightInMeters * heightInMeters);
+    const bmiFormatted = bmi.toFixed(2);
+
+    let category = '';
+    if (bmi < 18.5) {
+        category = 'Underweight';
+    } else if (bmi < 24.9) {
+        category = 'Normal weight';
+    } else if (bmi < 29.9) {
+        category = 'Overweight';
+    } else {
+        category = 'Obesity';
+    }
+
+    resultContainer.innerHTML = `Your BMI is: <strong>${bmiFormatted}</strong><br>Category: <strong>${category}</strong>`;
+}
+
+calculateBtn.addEventListener('click', calculateBMI);
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diff --git a/Domains/Frontend/MiniProjects/BMICalculator/style.css b/Domains/Frontend/MiniProjects/BMICalculator/style.css
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+body {
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    height: 100vh;
+    background-color: #f0f2f5;
+    margin: 0;
+}
+
+.bmi-container {
+    width: 90%;
+    max-width: 400px;
+    padding: 2rem;
+    background-color: #ffffff;
+    border-radius: 16px;
+    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
+    text-align: center;
+}
+
+h1 {
+    color: #333;
+    margin-bottom: 1.5rem;
+}
+
+.input-group {
+    margin-bottom: 1rem;
+    text-align: left;
+}
+
+.input-group label {
+    display: block;
+    margin-bottom: 0.5rem;
+    color: #555;
+    font-weight: 500;
+}
+
+.input-group input {
+    width: 100%;
+    padding: 0.75rem;
+    border: 1px solid #ddd;
+    border-radius: 8px;
+    box-sizing: border-box; /* Important for padding to work correctly */
+}
+
+button {
+    font-size: 1rem;
+    font-weight: 600;
+    color: #ffffff;
+    background-color: #007aff;
+    border: none;
+    padding: 0.75rem 1.5rem;
+    border-radius: 8px;
+    cursor: pointer;
+    transition: background-color 0.2s ease;
+    width: 100%;
+    margin-top: 0.5rem;
+}
+
+button:hover {
+    background-color: #0056b3;
+}
+
+.result {
+    margin-top: 1.5rem;
+    font-size: 1.1rem;
+    line-height: 1.6;
+}
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