CODE IDEAL WEIGHT CALCULATOR IN HTML CSS AND JAVASCRIPT

User-Friendly Interface: Simple, centered layout with a responsive design and attractive color gradient background.
Gender Selection: Allows users to select their gender, which affects the calculation of ideal weight.
Age, Height, and Weight Input: Users can input their age, height (in cm), and weight (in kg) to calculate BMI and ideal weight.
Buttons for Actions:
- Calculate Button: Calculates and displays the ideal weight and BMI based on the inputs.
- Clear Button: Clears all input fields and resets the display elements.
- History Button: Shows the user’s BMI and weight history in an alert box.
Ideal Weight Calculation: Calculates ideal weight based on gender and height, with a different formula for males and females.
BMI Calculation: Computes BMI from weight and height, then displays the result with an emoji and advice.
Result Display: Displays the ideal weight and BMI values along with relevant icons and styling.
Health Advice and Tips:
- Provides personalized health advice based on BMI categories (underweight, normal, overweight, obese).
- Offers tips for each category, such as dietary and lifestyle suggestions.
Progress Bar: Shows a visual representation of BMI status, where the width adjusts according to the BMI category (e.g., 25% for underweight, 50% for normal, etc.).
Icon Indicators: Displays an emoji next to the result to represent different BMI statuses, making it visually engaging.
Animations:
- Fade-in effect on the main calculator container for a smoother UI experience.
- Slide-in effect for the result display, enhancing visual appeal.
Local Storage for History: Saves previous calculations (gender, age, height, weight, ideal weight, BMI) in the browser’s local storage, allowing users to view their history of calculations.
Data Validation: Checks if the input values for age, height, and weight are valid numbers, displaying a warning if any are missing or invalid.
Responsive Design: Adjusts for various screen sizes to ensure a consistent user experience.
Tooltips and Placeholder Icons: Adds emojis to placeholders and labels for a friendly and intuitive interface.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>🌟 Ideal Weight & BMI Calculator 🌟</title>
    <style>
        /* Basic styling and animations */
        body {
            font-family: Arial, sans-serif;
            background: linear-gradient(120deg, #f6d365, #fda085);
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            color: #333;
            overflow: hidden;
        }

        .calculator-container {
            background-color: #ffffff;
            padding: 2em;
            border-radius: 12px;
            box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
            text-align: center;
            width: 400px;
            animation: fadeIn 1s ease-out;
            position: relative;
        }

        h1 {
            color: #333;
            font-size: 24px;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        h1::before {
            content: "🧮";
            margin-right: 8px;
        }

        label {
            display: block;
            margin-top: 10px;
            font-weight: bold;
        }

        input[type="number"], select {
            width: 100%;
            padding: 10px;
            margin-top: 8px;
            border-radius: 5px;
            border: 1px solid #ddd;
            font-size: 16px;
            transition: all 0.3s ease;
        }

        input[type="number"]:focus, select:focus {
            border-color: #fda085;
            outline: none;
        }

        .button-container {
            display: flex;
            gap: 10px;
            justify-content: center;
            margin-top: 20px;
        }

        .calculate-btn, .clear-btn, .history-btn {
            padding: 10px 20px;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            cursor: pointer;
            transition: background 0.3s ease;
        }

        .calculate-btn {
            background: #fda085;
            color: #fff;
        }

        .calculate-btn:hover {
            background: #f6d365;
        }

        .calculate-btn::before {
            content: "💪";
            margin-right: 8px;
        }

        .clear-btn {
            background: #e0e0e0;
            color: #333;
        }

        .clear-btn:hover {
            background: #ccc;
        }

        .history-btn {
            background: #82c91e;
            color: #fff;
        }

        .history-btn:hover {
            background: #63a917;
        }

        .result, .advice, .tips {
            margin-top: 20px;
            font-size: 18px;
            font-weight: bold;
            color: #444;
            animation: slideIn 1s ease-in-out;
        }

        .result-icon {
            font-size: 2em;
            margin-top: 15px;
        }

        .advice {
            font-size: 16px;
            color: #666;
            margin-top: 10px;
        }

        .tips {
            font-size: 14px;
            color: #888;
            font-style: italic;
        }

        .progress-bar-container {
            width: 100%;
            background-color: #eee;
            border-radius: 5px;
            margin-top: 15px;
        }

        .progress-bar {
            height: 10px;
            border-radius: 5px;
            background-color: #82c91e;
            width: 0;
            transition: width 1s ease;
        }

        /* Animations */
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
    </style>
</head>
<body>
    <div class="calculator-container">
        <h1>Ideal Weight & BMI Calculator</h1>
        <label for="gender">Gender: 👤</label>
        <select id="gender">
            <option value="male">Male 🚹</option>
            <option value="female">Female 🚺</option>
        </select>

        <label for="age">Age: 🎂</label>
        <input type="number" id="age" placeholder="Enter age">

        <label for="height">Height (cm): 📏</label>
        <input type="number" id="height" placeholder="Enter height in cm">

        <label for="weight">Current Weight (kg): ⚖️</label>
        <input type="number" id="weight" placeholder="Enter weight in kg">

        <div class="button-container">
            <button class="calculate-btn" onclick="calculateIdealWeight()">Calculate</button>
            <button class="clear-btn" onclick="clearInputs()">Clear</button>
            <button class="history-btn" onclick="showHistory()">History</button>
        </div>

        <div id="result" class="result"></div>
        <div class="progress-bar-container">
            <div id="progressBar" class="progress-bar"></div>
        </div>
        <div id="resultIcon" class="result-icon"></div>
        <div id="advice" class="advice"></div>
        <div id="tips" class="tips"></div>
    </div>

    <script>
        let history = [];

        function calculateIdealWeight() {
            const gender = document.getElementById("gender").value;
            const age = parseInt(document.getElementById("age").value);
            const height = parseFloat(document.getElementById("height").value);
            const weight = parseFloat(document.getElementById("weight").value);
            const resultDiv = document.getElementById("result");
            const resultIconDiv = document.getElementById("resultIcon");
            const adviceDiv = document.getElementById("advice");
            const tipsDiv = document.getElementById("tips");
            const progressBar = document.getElementById("progressBar");

            if (isNaN(height) || height <= 0 || isNaN(weight) || weight <= 0 || isNaN(age) || age <= 0) {
                resultDiv.textContent = "❌ Please enter valid age, height, and weight.";
                resultIconDiv.innerHTML = "⚠️";
                adviceDiv.textContent = "";
                tipsDiv.textContent = "";
                return;
            }

            let idealWeight;
            if (gender === "male") {
                idealWeight = 50 + 0.9 * (height - 152);
            } else {
                idealWeight = 45.5 + 0.9 * (height - 152);
            }

            const heightInMeters = height / 100;
            const bmi = weight / (heightInMeters * heightInMeters);
            resultDiv.textContent = `✨ Ideal Weight: ${idealWeight.toFixed(1)} kg | BMI: ${bmi.toFixed(1)}`;
            resultIconDiv.innerHTML = bmi > 0 ? "💪" : "";

            if (bmi < 18.5) {
                adviceDiv.textContent = "📉 Underweight: Consider a balanced diet to gain weight.";
                tipsDiv.textContent = "Tip: High-calorie foods and strength training can help.";
                progressBar.style.width = "25%";
            } else if (bmi >= 18.5 && bmi <= 24.9) {
                adviceDiv.textContent = "✅ Normal: Keep up the good work and maintain a healthy lifestyle!";
                tipsDiv.textContent = "Tip: A balanced diet and regular exercise can keep you on track!";
                progressBar.style.width = "50%";
            } else if (bmi >= 25 && bmi <= 29.9) {
                adviceDiv.textContent = "⚠️ Overweight: Consider regular exercise and a balanced diet.";
                tipsDiv.textContent = "Tip: Reduce processed food and increase physical activity.";
                progressBar.style.width = "75%";
            } else {
                adviceDiv.textContent = "❗ Obese: Consult a healthcare provider for personalized advice.";
                tipsDiv.textContent = "Tip: Consult a doctor for a personalized health plan.";
                progressBar.style.width = "100%";
            }

            history.push(`Gender: ${gender}, Age: ${age}, Height: ${height} cm, Weight: ${weight} kg, Ideal Weight: ${idealWeight.toFixed(1)} kg, BMI: ${bmi.toFixed(1)}`);
            localStorage.setItem("bmiHistory", JSON.stringify(history));
        }

        function clearInputs() {
            document.getElementById("age").value = "";
            document.getElementById("height").value = "";
            document.getElementById("weight").value = "";
            document.getElementById("result").textContent = "";
            document.getElementById("resultIcon").innerHTML = "";
            document.getElementById("advice").textContent = "";
            document.getElementById("tips").textContent = "";
            document.getElementById("progressBar").style.width = "0%";
        }

        function showHistory() {
            const savedHistory = localStorage.getItem("bmiHistory");
            if (savedHistory) {
                alert("History:\n" + JSON.parse(savedHistory).join("\n"));
            } else {
                alert("No history available.");
            }
        }
    </script>
</body>
</html>

JavaScript

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