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} @media (max-width: 768px) { .calculator-container { margin: 10px; padding: 15px; } .input-section { grid-template-columns: 1fr; gap: 15px; } } </style> </head> <body> <header class="header"> <div class="container"> <div class="logo"> <i class="fas fa-calculator"></i> <span>Calculator Tools</span> </div> <nav class="nav-menu"> <a href="index.html" class="nav-link">Home</a> <a href="#financial" class="nav-link">Financial</a> <a href="#health" class="nav-link active">Health & Fitness</a> <a href="#math" class="nav-link">Math</a> <a href="#time" class="nav-link">Time & Date</a> <a href="#other" class="nav-link">Other Tools</a> </nav> <div class="mobile-menu-toggle"> <i class="fas fa-bars"></i> </div> </div> </header> <div class="container"> <header> <h1>Pregnancy Weight Gain Calculator</h1> <p>Calculate recommended weight gain during pregnancy based on your pre-pregnancy BMI and current stage of pregnancy.</p> </header> <div class="calculator-container"> <div class="unit-toggle"> <button class="unit-btn active" onclick="toggleUnits('metric')">Metric (kg/cm)</button> <button class="unit-btn" onclick="toggleUnits('imperial')">Imperial (lbs/ft)</button> </div> <div class="input-section"> <div class="input-group"> <label for="height">Height:</label> <input type="number" id="height" placeholder="Enter height" step="0.1"> <small id="height-unit">cm</small> </div> <div class="input-group"> <label for="preWeight">Pre-pregnancy Weight:</label> <input type="number" id="preWeight" placeholder="Enter pre-pregnancy weight" step="0.1"> <small id="weight-unit">kg</small> </div> <div class="input-group"> <label for="currentWeight">Current Weight (optional):</label> <input type="number" id="currentWeight" placeholder="Enter current weight" step="0.1"> <small id="current-weight-unit">kg</small> </div> <div class="input-group"> <label for="weeks">Weeks Pregnant:</label> <input type="number" id="weeks" min="1" max="42" placeholder="Enter weeks"> </div> <div class="input-group"> <label for="pregnancyType">Pregnancy Type:</label> <select id="pregnancyType"> <option value="single">Single Baby</option> <option value="twins">Twins</option> <option value="triplets">Triplets or More</option> </select> </div> </div> <button class="calculate-btn" onclick="calculateWeightGain()">Calculate Recommended Weight Gain</button> <div id="results" class="results" style="display: none;"> <h3>Your Pregnancy Weight Gain Recommendations</h3> <div id="bmi-status"></div> <div id="weight-recommendations"></div> <div id="current-progress"></div> </div> </div> <div class="tips-section"> <h3>Healthy Weight Gain Guidelines</h3> <h4>Weight Gain by BMI Category (Single Baby):</h4> <div class="weight-chart"> <div class="chart-header">Pre-pregnancy BMI Categories</div> <div class="chart-row"> <span>Underweight (BMI < 18.5)</span> <span><strong>28-40 lbs (12.7-18 kg)</strong></span> </div> <div class="chart-row"> <span>Normal Weight (BMI 18.5-24.9)</span> <span><strong>25-35 lbs (11.3-15.9 kg)</strong></span> </div> <div class="chart-row"> <span>Overweight (BMI 25-29.9)</span> <span><strong>15-25 lbs (6.8-11.3 kg)</strong></span> </div> <div class="chart-row"> <span>Obese (BMI e" 30)</span> <span><strong>11-20 lbs (5-9 kg)</strong></span> </div> </div> <h4>Weight Gain Pattern:</h4> <ul> <li><strong>First Trimester (0-12 weeks):</strong> 1-4 lbs total</li> <li><strong>Second Trimester (13-26 weeks):</strong> 1-2 lbs per week</li> <li><strong>Third Trimester (27-40 weeks):</strong> 1-2 lbs per week</li> </ul> <h4>Multiple Pregnancies:</h4> <ul> <li><strong>Twins:</strong> 37-54 lbs (normal BMI), 31-50 lbs (overweight), 25-42 lbs (obese)</li> <li><strong>Triplets:</strong> Consult with healthcare provider for individualized recommendations</li> </ul> </div> <div class="warning-box"> <h4>�&� Important Medical Disclaimer</h4> <p>This calculator provides general guidelines based on Institute of Medicine recommendations. Every pregnancy is unique, and individual needs may vary. Always consult with your healthcare provider for personalized advice about appropriate weight gain during pregnancy, especially if you have medical conditions or concerns.</p> </div> <div class="tips-section"> <h3>Tips for Healthy Weight Gain</h3> <ul> <li><strong>Eat Nutrient-Dense Foods:</strong> Focus on fruits, vegetables, whole grains, lean proteins, and dairy</li> <li><strong>Stay Hydrated:</strong> Drink plenty of water throughout the day</li> <li><strong>Regular Exercise:</strong> With doctor's approval, maintain appropriate physical activity</li> <li><strong>Monitor Regularly:</strong> Weigh yourself weekly at the same time of day</li> <li><strong>Avoid Empty Calories:</strong> Limit sugary drinks, processed foods, and excessive sweets</li> <li><strong>Listen to Your Body:</strong> Eat when hungry, stop when satisfied</li> <li><strong>Take Prenatal Vitamins:</strong> Ensure adequate nutrition for you and baby</li> </ul> <h4>Warning Signs to Discuss with Your Doctor:</h4> <ul> <li>Sudden weight gain (more than 2 lbs in a week)</li> <li>No weight gain or weight loss in second/third trimester</li> <li>Excessive weight gain beyond recommendations</li> <li>Swelling in face, hands, or feet</li> <li>Severe nausea preventing adequate nutrition</li> </ul> </div> </div> <footer class="footer"> <div class="container"> <div class="footer-content"> <div class="footer-section"> <h4>Calculator Tools</h4> <ul> <li><a href="index.html">Home</a></li> <li><a href="sitemap.html">All Calculators</a></li> <li><a href="#about">About</a></li> </ul> </div> <div class="footer-section"> <h4>Categories</h4> <ul> <li><a href="#financial">Financial</a></li> <li><a href="#health">Health & Fitness</a></li> <li><a href="#math">Math</a></li> <li><a href="#time">Time & Date</a></li> </ul> </div> <div class="footer-section"> <h4>Support</h4> <ul> <li><a href="#privacy">Privacy Policy</a></li> <li><a href="#terms">Terms of Use</a></li> <li><a href="#contact">Contact</a></li> </ul> </div> </div> <div class="footer-bottom"> <p>&copy; 2024 Calculator Tools. All rights reserved.</p> <p>Designed & Developed by <strong>Long Th�i B�o</strong> | Unauthorized copying is strictly prohibited</p> <p><small>All content, design, and code are protected by copyright law</small></p> </div> </div> </footer> <script> let isMetric = true; function toggleUnits(unit) { isMetric = unit === 'metric'; // Update button appearance document.querySelectorAll('.unit-btn').forEach(btn => { btn.classList.remove('active'); }); event.target.classList.add('active'); // Update unit labels document.getElementById('height-unit').textContent = isMetric ? 'cm' : 'ft & in'; document.getElementById('weight-unit').textContent = isMetric ? 'kg' : 'lbs'; document.getElementById('current-weight-unit').textContent = isMetric ? 'kg' : 'lbs'; // Update placeholders document.getElementById('height').placeholder = isMetric ? 'Enter height in cm' : 'Enter height (e.g., 5.5 for 5\'6")'; document.getElementById('preWeight').placeholder = isMetric ? 'Enter weight in kg' : 'Enter weight in lbs'; document.getElementById('currentWeight').placeholder = isMetric ? 'Enter weight in kg' : 'Enter weight in lbs'; } function calculateWeightGain() { const height = parseFloat(document.getElementById('height').value); const preWeight = parseFloat(document.getElementById('preWeight').value); const currentWeight = parseFloat(document.getElementById('currentWeight').value) || null; const weeks = parseInt(document.getElementById('weeks').value); const pregnancyType = document.getElementById('pregnancyType').value; if (!height || !preWeight || !weeks) { alert('Please fill in height, pre-pregnancy weight, and weeks pregnant.'); return; } if (weeks < 1 || weeks > 42) { alert('Please enter a valid number of weeks (1-42).'); return; } // Convert to metric if needed let heightCm = height; let preWeightKg = preWeight; let currentWeightKg = currentWeight; if (!isMetric) { heightCm = height * 30.48; // feet to cm preWeightKg = preWeight * 0.453592; if (currentWeight) currentWeightKg = currentWeight * 0.453592; } // Calculate BMI const bmi = preWeightKg / Math.pow(heightCm / 100, 2); // Determine BMI category let bmiCategory, bmiClass, minGain, maxGain; if (bmi < 18.5) { bmiCategory = 'Underweight'; bmiClass = 'underweight'; minGain = pregnancyType === 'single' ? 12.7 : pregnancyType === 'twins' ? 22.7 : 23; maxGain = pregnancyType === 'single' ? 18 : pregnancyType === 'twins' ? 28 : 30; } else if (bmi < 25) { bmiCategory = 'Normal Weight'; bmiClass = 'normal'; minGain = pregnancyType === 'single' ? 11.3 : pregnancyType === 'twins' ? 16.8 : 17; maxGain = pregnancyType === 'single' ? 15.9 : pregnancyType === 'twins' ? 24.5 : 25; } else if (bmi < 30) { bmiCategory = 'Overweight'; bmiClass = 'overweight'; minGain = pregnancyType === 'single' ? 6.8 : pregnancyType === 'twins' ? 14.1 : 14; maxGain = pregnancyType === 'single' ? 11.3 : pregnancyType === 'twins' ? 22.7 : 23; } else { bmiCategory = 'Obese'; bmiClass = 'obese'; minGain = pregnancyType === 'single' ? 5 : pregnancyType === 'twins' ? 11.3 : 11; maxGain = pregnancyType === 'single' ? 9 : pregnancyType === 'twins' ? 19.1 : 19; } // Convert back to display units if needed const displayUnit = isMetric ? 'kg' : 'lbs'; const minGainDisplay = isMetric ? minGain : minGain * 2.20462; const maxGainDisplay = isMetric ? maxGain : maxGain * 2.20462; // Calculate expected weight gain by week let expectedGainSoFar = 0; if (weeks <= 12) { // First trimester: 1-4 lbs total expectedGainSoFar = (weeks / 12) * (isMetric ? 1.8 : 4); } else if (weeks <= 26) { // Second trimester: 1-2 lbs per week after first trimester const firstTrimesterGain = isMetric ? 1.8 : 4; const secondTrimesterWeeks = weeks - 12; expectedGainSoFar = firstTrimesterGain + (secondTrimesterWeeks * (isMetric ? 0.45 : 1)); } else { // Third trimester: continue 1-2 lbs per week const firstTrimesterGain = isMetric ? 1.8 : 4; const secondTrimesterGain = 14 * (isMetric ? 0.45 : 1); const thirdTrimesterWeeks = weeks - 26; expectedGainSoFar = firstTrimesterGain + secondTrimesterGain + (thirdTrimesterWeeks * (isMetric ? 0.45 : 1)); } // Display results let resultsHTML = ` <div class="bmi-indicator ${bmiClass}"> Pre-pregnancy BMI: ${bmi.toFixed(1)} (${bmiCategory}) </div> <div class="weight-chart"> <div class="chart-header">Your Recommended Total Weight Gain</div> <div style="text-align: center; padding: 20px;"> <div style="font-size: 24px; font-weight: bold; color: #007bff;"> ${minGainDisplay.toFixed(1)} - ${maxGainDisplay.toFixed(1)} ${displayUnit} </div> <div style="color: #666; margin-top: 5px;"> For ${pregnancyType === 'single' ? 'single baby' : pregnancyType} pregnancy </div> </div> </div> <div class="weight-chart"> <div class="chart-header">Expected Weight Gain by Week ${weeks}</div> <div style="text-align: center; padding: 15px;"> <div style="font-size: 18px; font-weight: bold;"> Expected gain so far: ${expectedGainSoFar.toFixed(1)} ${displayUnit} </div> </div> </div> `; if (currentWeight) { const actualGain = currentWeightKg - preWeightKg; const actualGainDisplay = isMetric ? actualGain : actualGain * 2.20462; const status = actualGainDisplay < expectedGainSoFar * 0.8 ? 'below' : actualGainDisplay > expectedGainSoFar * 1.2 ? 'above' : 'on track'; resultsHTML += ` <div class="weight-chart"> <div class="chart-header">Your Current Progress</div> <div style="padding: 15px;"> <div><strong>Actual weight gain:</strong> ${actualGainDisplay.toFixed(1)} ${displayUnit}</div> <div><strong>Status:</strong> <span style="color: ${status === 'on track' ? '#28a745' : '#dc3545'};">${status}</span></div> ${status !== 'on track' ? '<div style="margin-top: 10px; color: #856404;"><small>Consider discussing with your healthcare provider</small></div>' : ''} </div> </div> `; } document.getElementById('weight-recommendations').innerHTML = resultsHTML; document.getElementById('results').style.display = 'block'; // Scroll to results document.getElementById('results').scrollIntoView({ behavior: 'smooth', block: 'start' }); } // Allow Enter key to calculate document.addEventListener('keypress', function(e) { if (e.key === 'Enter') { calculateWeightGain(); } }); </script> </body> </html>