Calculate Healthy Weight – Loan calculator

Healthy Weight Calculator

Use this calculator to determine your Body Mass Index (BMI) and find your healthy weight range based on your height. BMI is a widely used indicator to categorize whether a person's weight is healthy relative to their height.

Unit System: Metric (cm, kg) Imperial (ft/in, lbs)

Height (cm):

Current Weight (kg):

Height (feet): Height (inches):

Current Weight (lbs):

Results:

Your Current BMI: —

BMI Category: —

Healthy Weight Range: —

Understanding Healthy Weight and BMI

Maintaining a healthy weight is crucial for overall well-being and reducing the risk of various health problems, including heart disease, diabetes, and certain cancers. The Body Mass Index (BMI) is a widely used screening tool to categorize weight status in adults. It's calculated based on your height and weight and provides an estimate of body fat.

How BMI is Calculated

BMI is calculated using a simple formula:

Metric: BMI = weight (kg) / (height (m))^2
Imperial: BMI = (weight (lbs) / (height (inches))^2) * 703

The calculator above performs these calculations for you, converting units as necessary.

BMI Categories

For most adults, BMI categories are interpreted as follows:

Underweight: Less than 18.5
Healthy Weight: 18.5 to 24.9
Overweight: 25.0 to 29.9
Obesity: 30.0 or greater

It's important to note that BMI is a screening tool and not a diagnostic tool. It doesn't directly measure body fat or account for factors like muscle mass, bone density, or body composition. For example, a very muscular athlete might have a high BMI but very little body fat, while an elderly person with low muscle mass might have a healthy BMI but a higher percentage of body fat.

Why a Healthy Weight Range?

Instead of a single "ideal" weight, health professionals often refer to a "healthy weight range." This range acknowledges that people of the same height can have slightly different healthy weights due to individual variations in body composition. The healthy weight range provided by this calculator is derived from the healthy BMI range (18.5 to 24.9).

Factors Beyond BMI

While BMI is a useful starting point, other factors contribute to a comprehensive assessment of health and weight, including:

Waist Circumference: High waist circumference can indicate increased abdominal fat, which is linked to higher health risks.
Body Composition: The ratio of fat to lean muscle mass.
Diet and Physical Activity: Lifestyle habits play a significant role in health regardless of BMI.
Medical History: Pre-existing conditions and family history.

Always consult with a healthcare professional for personalized advice regarding your weight and health goals. They can provide a more thorough assessment based on your individual circumstances.

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/* Inputs take full width */ max-width: none; } .calculator-form .input-group { flex-direction: column; align-items: flex-start; } } function toggleUnits() { var metricInputs = document.getElementById('metricInputs'); var imperialInputs = document.getElementById('imperialInputs'); var metricRadio = document.getElementById('metric'); if (metricRadio.checked) { metricInputs.style.display = 'block'; imperialInputs.style.display = 'none'; } else { metricInputs.style.display = 'none'; imperialInputs.style.display = 'block'; } } function calculateHealthyWeight() { var heightM; var currentWeightKgVal; var unitSystem = document.querySelector('input[name="unitSystem"]:checked').value; // Get height and weight based on unit system if (unitSystem === 'metric') { var heightCm = parseFloat(document.getElementById('heightCm').value); var currentWeightKg = parseFloat(document.getElementById('currentWeightKg').value); if (isNaN(heightCm) || heightCm <= 0 || isNaN(currentWeightKg) || currentWeightKg <= 0) { alert('Please enter valid positive numbers for height and current weight.'); return; } heightM = heightCm / 100; currentWeightKgVal = currentWeightKg; } else { // imperial var heightFt = parseFloat(document.getElementById('heightFt').value); var heightIn = parseFloat(document.getElementById('heightIn').value); var currentWeightLbs = parseFloat(document.getElementById('currentWeightLbs').value); if (isNaN(heightFt) || heightFt < 0 || isNaN(heightIn) || heightIn 11 || isNaN(currentWeightLbs) || currentWeightLbs <= 0) { alert('Please enter valid positive numbers for height (feet and inches) and current weight.'); return; } var totalInches = (heightFt * 12) + heightIn; if (totalInches <= 0) { alert('Total height must be greater than zero.'); return; } heightM = totalInches * 0.0254; // Convert inches to meters currentWeightKgVal = currentWeightLbs * 0.453592; // Convert lbs to kg } // Calculate Current BMI var currentBMI = currentWeightKgVal / (heightM * heightM); // Determine BMI Category var bmiCategory; if (currentBMI = 18.5 && currentBMI = 25.0 && currentBMI <= 29.9) { bmiCategory = 'Overweight'; } else { bmiCategory = 'Obesity'; } // Calculate Healthy Weight Range (based on BMI 18.5 to 24.9) var minHealthyWeightKg = 18.5 * (heightM * heightM); var maxHealthyWeightKg = 24.9 * (heightM * heightM); var minHealthyWeightLbs = minHealthyWeightKg / 0.453592; var maxHealthyWeightLbs = maxHealthyWeightKg / 0.453592; // Determine weight adjustment needed var weightAdjustmentText = ''; if (currentBMI 24.9) { var weightToLoseKg = currentWeightKgVal – maxHealthyWeightKg; var weightToLoseLbs = (currentWeightKgVal / 0.453592) – maxHealthyWeightLbs; weightAdjustmentText = 'You need to lose approximately ' + weightToLoseKg.toFixed(1) + ' kg (' + weightToLoseLbs.toFixed(1) + ' lbs) to reach a healthy weight.'; } else { weightAdjustmentText = 'Your current weight is within the healthy range.'; } // Display Results document.getElementById('resultCurrentBMI').innerText = currentBMI.toFixed(2); document.getElementById('resultBMICategory').innerText = bmiCategory; document.getElementById('resultHealthyWeightRange').innerText = minHealthyWeightKg.toFixed(1) + ' kg – ' + maxHealthyWeightKg.toFixed(1) + ' kg (' + minHealthyWeightLbs.toFixed(1) + ' lbs – ' + maxHealthyWeightLbs.toFixed(1) + ' lbs)'; document.getElementById('resultWeightAdjustment').innerText = weightAdjustmentText; } // Initialize unit display on page load document.addEventListener('DOMContentLoaded', function() { toggleUnits(); calculateHealthyWeight(); // Calculate with default values on load });