Advanced BMI Calculator – Metric & Imperial Units

Enter your weight and height, and select your preferred units (metric or imperial) to calculate your BMI. Units: Metric (kg, m) Imperial (lbs, inches) Weight: Height: Calculate BMI BMI History function updatePlaceholder() { const units = document.getElementById('units').value; if (units === 'imperial') { document.getElementById('weight').placeholder = 'Enter your weight (lbs)'; document.getElementById('height').placeholder = 'Enter your height (inches)'; } else { document.getElementById('weight').placeholder = 'Enter your weight (kg)'; document.getElementById('height').placeholder = 'Enter your height (m)'; } } function validateInput(weight, height) { const weightError = document.getElementById('weightError'); const heightError = document.getElementById('heightError'); let isValid = true; if (isNaN(weight) || weight = 25 && bmi < 29.9) { category = "Overweight"; } else { category = "Obese"; } document.getElementById("bmiResult").innerHTML = `Your BMI: ${bmi} (${category})`; // Save BMI result to history saveBMIToHistory(bmi, category); displayHistory(); } function saveBMIToHistory(bmi, category) { const history = JSON.parse(localStorage.getItem('bmiHistory')) || []; const date = new Date().toLocaleString(); history.push({ bmi, category, date }); localStorage.setItem('bmiHistory', JSON.stringify(history)); } function displayHistory() { const history = JSON.parse(localStorage.getItem('bmiHistory')) || []; const historyList = document.getElementById('historyList'); historyList.innerHTML = ''; history.forEach(entry => { const listItem = document.createElement('li'); listItem.textContent = `BMI: ${entry.bmi} (${entry.category}) - ${entry.date}`; historyList.appendChild(listItem); }); } // Initialize with history display window.onload = function() { displayHistory(); }; .va_styles.calculator-container { background-color: #fff; border-radius: 8px; max-width: 600px; margin: 20px auto; padding: 20px; } .va_styles input, .va_styles select, .va_styles button { width: 100% ; margin: 10px 0; padding: 10px; border-radius: 5px; border: 1px solid #ccc; font-size: 16px; height: 45px; } .va_styles button { color: #fff; cursor: pointer; } button:hover { background-color: #218838; } .va_styles .result { margin-top: 15px; font-size: 18px; color: #333; display: inline-block; width: 100%; padding: 10px; background: #c3e4fc; margin-bottom: 25px; font-weight: 500; border-radius: 4px; } .va_styles .error { color: red; font-size: 14px; clear: both; display: inline-block; width: 100%; margin-top: -10px; margin-bottom: 10px; float: left; } .va_styles .history { margin-top: 20px; } .history ul { list-style-type: none; padding: 0; } .va_styles .history li { background-color: #f9f9f9; padding: 10px; margin-bottom: 5px; border-left: 4px solid #28a745; } @media only screen and (max-width: 600px) { .va_styles .calculator-container { width: 100%; box-shadow: none; padding: 10px; } }

Advanced BMI Calculator – Metric & Imperial Units

BMI History

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BMI History

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