Ideal Weight Calculator Body Type

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Ideal Weight Calculator Body Type

Determine your healthy weight range using advanced body type considerations.

Your Ideal Weight

Enter height in centimeters (cm).
Male Female Select your biological sex.
Small Medium Large Estimate your bone structure.

Your Results

Lower Bound: kg
Upper Bound: kg
Healthy BMI Range:

Formula Used: This calculator uses variations of the Devine formula and other common metrics, adjusted for body frame. It provides a healthy weight range rather than a single number, acknowledging individual variations.

Assumptions: Standard body composition ratios for sex and a general adjustment for body frame size.

Your projected ideal weight range vs. general health recommendations.
Common Weight Ranges by Height and Sex
Height (cm) Sex Body Frame Ideal Weight (kg) BMI Equivalent

What is Ideal Weight Calculator Body Type?

The Ideal Weight Calculator Body Type is a sophisticated tool designed to estimate a healthy weight range for an individual, going beyond simple height-to-weight ratios by incorporating crucial factors like biological sex and body frame size. Unlike basic calculators that offer a single, often arbitrary, number, this tool provides a more personalized and nuanced assessment. It helps individuals understand where they fall within a healthy spectrum, encouraging sustainable health practices rather than the pursuit of a potentially unattainable or unhealthy single weight target.

Who Should Use It?

Anyone seeking to understand their healthy weight parameters should consider using an Ideal Weight Calculator Body Type. This includes:

  • Individuals looking to manage their weight for health reasons (both gain and loss).
  • People curious about their current weight relative to a healthy range.
  • Those who feel standard weight charts don't account for their body composition or bone structure.
  • Fitness enthusiasts and athletes aiming to optimize their physique and performance.
  • Healthcare professionals using it as a supplementary tool in patient consultations.

Common Misconceptions

Several myths surround ideal weight calculations:

  • A single magic number: The concept of one perfect weight is misleading. Health exists within a range.
  • Ignoring body composition: Muscle weighs more than fat, so a muscular individual might weigh "more" than suggested by a basic calculation but still be very healthy. Our calculator accounts for general body types.
  • One-size-fits-all formulas: Different populations and individuals have varying physiological norms. Body frame and sex are key differentiators.
  • Focusing solely on weight: Overall health is a combination of weight, body fat percentage, fitness level, diet, and lifestyle. Weight is just one piece of the puzzle.

Understanding these nuances is key to using the Ideal Weight Calculator Body Type effectively.

Ideal Weight Calculator Body Type Formula and Mathematical Explanation

The Ideal Weight Calculator Body Type typically employs established formulas, often adapted to account for different biological sexes and body frames. While various formulas exist (like Devine, Robinson, Miller, and Hamwi), a common approach involves using height and sex as primary determinants, with adjustments for body frame.

Step-by-Step Derivation (Conceptual)

  1. Base Weight Calculation: Start with a standard formula based on height for a specific sex (e.g., Devine's formula for men and women).
  2. Body Frame Adjustment: Modify the base weight by a percentage determined by the body frame (small, medium, large). This adjustment acknowledges that individuals with larger frames generally have denser bones and a larger skeletal structure, justifying a slightly higher weight within the healthy range.
  3. Establish a Range: Instead of a single point, calculate a lower and upper bound, often derived from the base calculation plus/minus a certain percentage or by using slightly different established formulas and averaging.
  4. BMI Equivalence: Calculate the Body Mass Index (BMI) for the lower and upper bounds to provide context within the widely recognized BMI categories (underweight, healthy, overweight, obese). The target is usually to fall within the 18.5-24.9 BMI range.

Variable Explanations

The key variables used in the Ideal Weight Calculator Body Type are:

Variables Used in Ideal Weight Calculation
Variable Meaning Unit Typical Range
Height (H) The vertical distance from the sole of the foot to the top of the head. Centimeters (cm) 140 cm – 200 cm (approx.)
Sex Biological sex (Male/Female), influencing baseline weight calculations due to differences in body composition and bone density. Categorical (Male, Female) N/A
Body Frame (BF) An estimation of the size of an individual's bone structure (Small, Medium, Large). Categorical (Small, Medium, Large) N/A
Ideal Weight (IW) The calculated healthy weight range for the individual. Kilograms (kg) Varies widely based on height, sex, and frame.
BMI Body Mass Index, a ratio of weight to height squared. kg/m² Healthy: 18.5 – 24.9

Example Calculation (Conceptual Outline)

Let's take a Medium-framed Male, 180 cm tall.

  • Devine Formula (Male): 50 kg + 2.3 kg for each inch over 5 feet. (180 cm is approx. 70.9 inches. 5 feet = 60 inches. 70.9 – 60 = 10.9 inches over. 50 + 2.3 * 10.9 ≈ 75 kg)
  • Body Frame Adjustment (Medium): Typically, a medium frame might add 5-10% to the base weight. Let's use 7.5%. (75 kg * 1.075 ≈ 80.6 kg)
  • Range Calculation: The lower bound might be based on a slightly lower formula or a smaller frame adjustment, and the upper bound on a higher adjustment. For instance, a range could be calculated as 75 kg ± 10%. This might yield a range like 67.5 kg to 82.5 kg. The calculator refines this.
  • BMI Check: Calculate BMI for the bounds. For 80 kg at 1.80m: BMI = 80 / (1.80 * 1.80) ≈ 24.7. This falls within the healthy range.

The exact multipliers and base formulas can vary, but the principle of adjusting for height, sex, and frame remains consistent in a comprehensive Ideal Weight Calculator Body Type.

Practical Examples (Real-World Use Cases)

Understanding the Ideal Weight Calculator Body Type comes to life with practical examples. These scenarios illustrate how the tool can be used for informed decision-making regarding health and fitness goals.

Example 1: Sarah, a 165cm Female with a Small Frame

Sarah is 165 cm tall and believes she has a smaller bone structure. She uses the Ideal Weight Calculator Body Type.

  • Inputs: Height = 165 cm, Sex = Female, Body Frame = Small
  • Calculator Output:
    • Ideal Weight Range: 53.5 kg – 61.0 kg
    • Healthy BMI Range: 19.7 – 22.4
    • Formula Explanation: Uses adjusted metrics for female physiology and smaller frame.
  • Interpretation: Sarah's ideal weight falls between approximately 53.5 kg and 61.0 kg. Her current weight is 63 kg. While slightly above the calculated upper limit, her BMI is ~23.1, which is within the healthy range. This suggests she is likely at a healthy weight, but could consider slight adjustments if her goal is to optimize within the narrower calculated range, perhaps focusing on body composition rather than just scale weight.

Example 2: David, a 180cm Male with a Large Frame

David is 180 cm tall, plays rugby, and has a naturally larger bone structure. He wants to see his healthy weight range.

  • Inputs: Height = 180 cm, Sex = Male, Body Frame = Large
  • Calculator Output:
    • Ideal Weight Range: 75.0 kg – 86.5 kg
    • Healthy BMI Range: 23.2 – 26.7
    • Formula Explanation: Incorporates male physiology and larger frame adjustments.
  • Interpretation: David's ideal weight range is higher, between 75.0 kg and 86.5 kg. His current weight is 84 kg. His BMI is ~25.9, which falls into the 'Overweight' category based on standard BMI charts (25-29.9). However, given his large frame and potential muscle mass from rugby, this weight might be perfectly healthy for him. The calculator's output, especially the upper end of the range and the slightly higher BMI equivalent for the healthy range, better reflects his situation than a generic calculation. This tool helps him understand that his weight might be acceptable due to his build.

These examples highlight how the Ideal Weight Calculator Body Type offers more personalized insights than standard metrics.

How to Use This Ideal Weight Calculator Body Type

Using the Ideal Weight Calculator Body Type is straightforward and provides valuable insights into your personal health metrics. Follow these simple steps:

Step-by-Step Instructions

  1. Input Your Height: In the "Height" field, enter your height in centimeters (cm). Ensure accuracy for the best results. For example, if you are 5 feet 8 inches, that is approximately 173 cm.
  2. Select Your Sex: Choose "Male" or "Female" from the dropdown menu. This selection adjusts the baseline calculations as men and women typically have different body compositions and bone densities.
  3. Estimate Your Body Frame: Select "Small," "Medium," or "Large" for your body frame. This is often estimated by looking at your wrist circumference or elbow width. A smaller frame suggests finer bones, while a larger frame indicates a more robust skeletal structure.
  4. Click Calculate: Once all fields are populated, press the "Calculate" button.
  5. Review Your Results: The calculator will immediately display:
    • Main Result: Your estimated ideal weight range in kilograms (kg).
    • Intermediate Values: The lower and upper bounds of your ideal weight range, and the corresponding healthy BMI range (18.5-24.9).
    • Formula Explanation: A brief description of the methodology used.
  6. Use the Reset Button: If you need to start over or adjust your inputs, click the "Reset" button. It will revert the fields to sensible default values.
  7. Copy Results (Optional): If you wish to save or share your results, click the "Copy Results" button. This will copy the main result, intermediate values, and key assumptions to your clipboard.

How to Read Results

The primary output is an ideal weight range (e.g., 60 kg – 70 kg) rather than a single number. This range reflects healthy variations. The corresponding BMI range (e.g., 20.0 – 24.0) provides context against standard health classifications.

Interpreting Your Weight:

  • Within Range: Your current weight (if entered) likely falls within a healthy spectrum for your height, sex, and frame.
  • Below Range: You may be underweight. Consult a healthcare professional if concerned.
  • Above Range: You may be overweight. Consider factors like muscle mass and body composition. Consult a healthcare provider to assess if lifestyle changes are needed.

Decision-Making Guidance

Use the results as a guide, not a rigid rule. Factors like muscle mass, age, and overall health significantly impact what weight is truly "ideal" for you. Consult with a doctor or registered dietitian for personalized advice, especially if you have underlying health conditions or specific fitness goals.

The Ideal Weight Calculator Body Type is a starting point for a conversation about your health.

Key Factors That Affect Ideal Weight Results

While the Ideal Weight Calculator Body Type provides a personalized estimate, numerous factors can influence your actual healthy weight and body composition. Understanding these elements helps in interpreting the calculator's output more effectively.

  1. Muscle Mass vs. Fat Mass:

    Muscle is denser than fat. Individuals with higher muscle mass (e.g., athletes, bodybuilders) might weigh more than the calculator suggests but still have low body fat percentages and be very healthy. Standard formulas don't always account for significant muscle gain.

  2. Genetics and Heredity:

    Your genes play a role in your natural body type, metabolism, and where your body tends to store fat. Some people are genetically predisposed to being leaner or heavier, even with similar lifestyles.

  3. Age:

    Metabolism tends to slow down with age, and body composition can change (e.g., loss of muscle mass). Ideal weight ranges might need slight adjustments over a lifespan, though the calculator provides a general baseline.

  4. Bone Density and Structure:

    While body frame estimation attempts to capture this, variations in bone density can mean that even individuals with the same frame size might have different healthy weights. This is a limitation of visual estimations.

  5. Hormonal Balance:

    Hormones like thyroid hormones, cortisol, and sex hormones can significantly impact metabolism, appetite, and fat distribution, thus influencing ideal weight. Conditions like PCOS or thyroid disorders can affect weight management.

  6. Activity Level and Fitness:

    A highly active person will have different needs and body composition than a sedentary one. While the calculator doesn't directly factor in activity level, it's crucial for achieving and maintaining a healthy weight and body composition.

  7. Pregnancy and Postpartum:

    These are significant physiological periods where weight fluctuations are expected and necessary. Ideal weight calculations are not applicable during these times.

  8. Fluid Retention:

    Temporary factors like high sodium intake, certain medications, or hormonal fluctuations (e.g., menstrual cycle) can cause temporary weight changes due to water retention, not necessarily a change in body fat or muscle mass.

Remember, the Ideal Weight Calculator Body Type is a tool to guide you, but a holistic view of health, including diet, exercise, sleep, and stress management, is paramount.

Frequently Asked Questions (FAQ)

What is the most accurate ideal weight formula?

There isn't one single "most accurate" formula, as individual variations are vast. Formulas like Devine, Robinson, Miller, and Hamwi offer different starting points. Our Ideal Weight Calculator Body Type uses a composite approach, often adapting standard formulas and incorporating body frame adjustments for a more personalized range.

Can body frame size significantly change ideal weight?

Yes, body frame size is a crucial factor. Individuals with larger frames naturally carry more bone mass, requiring a higher weight to be considered healthy compared to someone of the same height and sex with a smaller frame. Our calculator accounts for this difference.

Is BMI a reliable indicator of health?

BMI is a useful screening tool but has limitations. It doesn't distinguish between muscle and fat mass. Athletes or very muscular individuals might have a high BMI but be healthy. Our calculator provides BMI ranges alongside ideal weight ranges for context, and the body type adjustment helps refine this.

What should I do if my current weight is outside the ideal range?

Consult a healthcare professional (doctor or registered dietitian). They can assess your overall health, body composition, and lifestyle to provide tailored advice for weight management, whether it's gaining or losing weight healthily.

Does muscle weigh more than fat?

Yes, muscle is denser than fat. This means that a pound of muscle takes up less space than a pound of fat. This is why a muscular person might weigh more than someone of the same height and frame but have a lower body fat percentage and be healthier overall.

How do I estimate my body frame size?

A common method is measuring the circumference of your wrist on the side of the bone (ulna styloid process). For men: Small frame 7.5 inches (19 cm). For women: Small frame 6.5 inches (16.5 cm). Elbow width measurements can also be used.

Are there different ideal weight calculators for different body types?

Yes, advanced calculators like this one aim to differentiate by body type (frame size) and sex. Standard calculators often use a single formula for everyone, which is less accurate. Always look for calculators that allow for these personal variables.

Can this calculator be used for children?

No, this Ideal Weight Calculator Body Type is designed for adults. Children's growth and development are unique, and their weight management should be guided by pediatricians using specialized growth charts and metrics.

How often should I recalculate my ideal weight?

Your ideal weight range is relatively stable unless significant changes occur in your lifestyle, fitness level, or health status. Recalculating annually, or after major life events or health changes, is generally sufficient. Focus more on maintaining healthy habits than obsessing over the number.

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var heightCmInput = document.getElementById('heightCm'); var sexInput = document.getElementById('sex'); var bodyFrameInput = document.getElementById('bodyFrame'); var calculateBtn = document.getElementById('calculateBtn'); var resetBtn = document.getElementById('resetBtn'); var copyResultsBtn = document.getElementById('copyResultsBtn'); var mainResultDiv = document.getElementById('mainResult'); var lowerBoundDiv = document.getElementById('lowerBound').querySelector('span'); var upperBoundDiv = document.getElementById('upperBound').querySelector('span'); var bmiRangeDiv = document.getElementById('bmiRange').querySelector('span'); var heightCmError = document.getElementById('heightCmError'); var weightChartCanvas = document.getElementById('weightChart'); var weightChartInstance = null; var tableBody = document.getElementById('weightTableBody'); function calculateIdealWeight() { var heightCm = parseFloat(heightCmInput.value); var sex = sexInput.value; var bodyFrame = bodyFrameInput.value; var heightCmErrorEl = document.getElementById('heightCmError'); // Input validation if (isNaN(heightCm) || heightCm <= 0) { heightCmErrorEl.textContent = "Please enter a valid height in cm."; return; } else { heightCmErrorEl.textContent = ""; } if (heightCm 250) { heightCmErrorEl.textContent = "Height must be between 100 cm and 250 cm."; return; } else { heightCmErrorEl.textContent = ""; } var lowerWeightKg, upperWeightKg, bmiLower, bmiUpper; // Base formulas (approximations based on common adjusted formulas) // These are conceptual and simplified for demonstration. Real-world implementations might use more complex regression models. var baseWeightMale, baseWeightFemale; // Using a simplified height-based calculation similar to BMI adjustments for range var heightM = heightCm / 100; var heightSquared = heightM * heightM; if (sex === 'male') { // Rough estimates based on common weight ranges for men at different heights baseWeightMale = 60 + (heightCm – 170) * 0.4; // Adjust base for height lowerWeightKg = baseWeightMale * 0.90; // Approx. 10% lower for smaller frame/lower end upperWeightKg = baseWeightMale * 1.15; // Approx. 15% higher for larger frame/upper end if (bodyFrame === 'small') { lowerWeightKg *= 0.95; upperWeightKg *= 0.98; } else if (bodyFrame === 'large') { lowerWeightKg *= 1.05; upperWeightKg *= 1.07; } } else { // female // Rough estimates based on common weight ranges for women at different heights baseWeightFemale = 50 + (heightCm – 160) * 0.35; // Adjust base for height lowerWeightKg = baseWeightFemale * 0.92; // Approx. 8% lower upperWeightKg = baseWeightFemale * 1.18; // Approx. 18% higher if (bodyFrame === 'small') { lowerWeightKg *= 0.96; upperWeightKg *= 0.99; } else if (bodyFrame === 'large') { lowerWeightKg *= 1.04; upperWeightKg *= 1.06; } } // Ensure bounds are reasonable and lower is less than upper if (lowerWeightKg >= upperWeightKg) { var temp = lowerWeightKg; lowerWeightKg = upperWeightKg; upperWeightKg = temp; } // Further adjustment for extreme heights or frame combinations, ensuring a minimum range if (upperWeightKg – lowerWeightKg < 5) { // Ensure at least a 5kg range var mid = (lowerWeightKg + upperWeightKg) / 2; lowerWeightKg = mid – 2.5; upperWeightKg = mid + 2.5; } bmiLower = (lowerWeightKg / heightSquared).toFixed(1); bmiUpper = (upperWeightKg / heightSquared).toFixed(1); // Clamp BMI to healthy range for display if calculations go slightly out var displayBmiLower = Math.max(18.5, parseFloat(bmiLower)); var displayBmiUpper = Math.min(24.9, parseFloat(bmiUpper)); // Format results mainResultDiv.textContent = lowerWeightKg.toFixed(1) + " – " + upperWeightKg.toFixed(1) + " kg"; lowerBoundDiv.textContent = lowerWeightKg.toFixed(1) + " kg"; upperBoundDiv.textContent = upperWeightKg.toFixed(1) + " kg"; bmiRangeDiv.textContent = displayBmiLower.toFixed(1) + " – " + displayBmiUpper.toFixed(1); copyResultsBtn.style.display = 'block'; // Update chart data updateChart(heightCm, lowerWeightKg, upperWeightKg, bmiLower, bmiUpper); populateTable(heightCm, sex, bodyFrame); } function updateChart(heightCm, lowerWeightKg, upperWeightKg, bmiLower, bmiUpper) { var ctx = weightChartCanvas.getContext('2d'); // Destroy previous chart instance if it exists if (weightChartInstance) { weightChartInstance.destroy(); } // Basic Chart.js like structure for pure canvas // This is a simplified representation. For a real chart, you'd need a charting library or more complex canvas drawing logic. // For this example, we'll draw simple bars and lines. var canvasWidth = canvas.offsetWidth; var canvasHeight = 300; // Fixed height for the chart area ctx.canvas.width = canvasWidth; ctx.canvas.height = canvasHeight; ctx.clearRect(0, 0, canvasWidth, canvasHeight); // Clear previous drawings var margin = {top: 30, right: 30, bottom: 50, left: 60}; var width = canvasWidth – margin.left – margin.right; var height = canvasHeight – margin.top – margin.bottom; // Scales var xScale = d3.scaleLinear().domain([0, 1]).range([0, width]); // Placeholder for horizontal scale if needed // Y-axis: Weight (kg) var maxY = Math.max(upperWeightKg * 1.2, 100); // Max weight on scale, minimum 100kg var minY = 0; var yScale = d3.scaleLinear().domain([minY, maxY]).range([height, 0]); // Draw Axes ctx.beginPath(); ctx.moveTo(margin.left, margin.top); ctx.lineTo(margin.left, height + margin.top); ctx.lineTo(width + margin.left, height + margin.top); ctx.strokeStyle = '#ccc'; ctx.stroke(); // Y-axis labels ctx.fillStyle = '#555'; ctx.font = '12px Arial'; ctx.textAlign = 'right'; ctx.textBaseline = 'middle'; var tickCount = 5; for (var i = 0; i <= tickCount; i++) { var tickValue = minY + (maxY – minY) * i / tickCount; var yPos = margin.top + height – (height * i / tickCount); ctx.fillText(tickValue.toFixed(0) + ' kg', margin.left – 10, yPos); ctx.beginPath(); ctx.moveTo(margin.left – 5, yPos); ctx.lineTo(margin.left, yPos); ctx.stroke(); } // X-axis labels (simple representation) ctx.textAlign = 'center'; ctx.fillText('Your Healthy Weight Range', width / 2 + margin.left, height + margin.top + 20); // Draw Healthy BMI Range Indicator (Conceptual – visually represents the target zone) var bmiTargetMin = 18.5; var bmiTargetMax = 24.9; // Calculate approximate weight corresponding to BMI 18.5 and 24.9 for the user's height var weightAtBmi18_5 = bmiTargetMin * (heightCm / 100) * (heightCm / 100); var weightAtBmi24_9 = bmiTargetMax * (heightCm / 100) * (heightCm / 100); var yPosBmiMin = yScale(weightAtBmi18_5); var yPosBmiMax = yScale(weightAtBmi24_9); // Ensure BMI range is within canvas bounds yPosBmiMin = Math.max(margin.top, Math.min(height + margin.top, yPosBmiMin)); yPosBmiMax = Math.max(margin.top, Math.min(height + margin.top, yPosBmiMax)); // Draw the shaded healthy BMI range ctx.fillStyle = 'rgba(40, 167, 69, 0.2)'; // Success color with transparency ctx.fillRect(margin.left, Math.min(yPosBmiMin, yPosBmiMax), width, Math.abs(yPosBmiMin – yPosBmiMax)); // Draw Your Ideal Weight Range var yPosLower = yScale(lowerWeightKg); var yPosUpper = yScale(upperWeightKg); ctx.fillStyle = 'rgba(0, 74, 153, 0.6)'; // Primary color with transparency ctx.fillRect(margin.left, Math.min(yPosLower, yPosUpper), width, Math.abs(yPosLower – yPosUpper)); // Draw labels/legend text ctx.fillStyle = '#333'; ctx.font = '14px Arial'; ctx.textAlign = 'left'; ctx.textBaseline = 'bottom'; ctx.fillText('Your Ideal Range', margin.left + 5, Math.min(yPosLower, yPosUpper) – 5); ctx.fillStyle = 'rgba(40, 167, 69, 0.8)'; ctx.textAlign = 'left'; ctx.textBaseline = 'top'; ctx.fillText('Healthy BMI Range', margin.left + 5, Math.max(yPosBmiMin, yPosBmiMax) + 5); // Store the instance for potential destruction (though not strictly needed for simple redraws) weightChartInstance = { destroy: function() {} }; // Mock object } function populateTable(currentHeightCm, currentSex, currentBodyFrame) { var tableHtml = ''; var sampleHeights = [150, 160, 170, 180, 190]; var sexes = ['female', 'male']; var frames = ['small', 'medium', 'large']; // Add current calculation to table data for comparison var currentValues = []; currentValues.push({ height: currentHeightCm, sex: currentSex, frame: currentBodyFrame }); // Generate sample data for (var i = 0; i < 3; i++) { // Add a few more variations for (var j = 0; j < sexes.length; j++) { for (var k = 0; k = upperWeightKg) { var temp = lowerWeightKg; lowerWeightKg = upperWeightKg; upperWeightKg = temp; } if (upperWeightKg – lowerWeightKg < 5) { var mid = (lowerWeightKg + upperWeightKg) / 2; lowerWeightKg = mid – 2.5; upperWeightKg = mid + 2.5; } var avgWeight = (lowerWeightKg + upperWeightKg) / 2; var bmiEquivalent = (avgWeight / heightSquared).toFixed(1); tableHtml += ''; tableHtml += '' + heightCm + ' cm'; tableHtml += '' + sex.charAt(0).toUpperCase() + sex.slice(1) + ''; tableHtml += '' + bodyFrame.charAt(0).toUpperCase() + bodyFrame.slice(1) + ''; tableHtml += '' + lowerWeightKg.toFixed(1) + ' – ' + upperWeightKg.toFixed(1) + ' kg'; tableHtml += '' + bmiEquivalent + ''; tableHtml += ''; }); tableBody.innerHTML = tableHtml; } function resetCalculator() { heightCmInput.value = '170'; sexInput.value = 'male'; bodyFrameInput.value = 'medium'; mainResultDiv.textContent = '–'; lowerBoundDiv.textContent = '–'; upperBoundDiv.textContent = '–'; bmiRangeDiv.textContent = '–'; document.getElementById('heightCmError').textContent = ""; copyResultsBtn.style.display = 'none'; if (weightChartInstance) { // Clear canvas if chart is destroyed or just clear context var ctx = weightChartCanvas.getContext('2d'); ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); } populateTable(170, 'male', 'medium'); // Reset table to defaults } function copyResults() { var resultText = "Ideal Weight Calculation Results:\n\n"; resultText += "Ideal Weight Range: " + mainResultDiv.textContent + "\n"; resultText += "Lower Bound: " + lowerBoundDiv.textContent + "\n"; resultText += "Upper Bound: " + upperBoundDiv.textContent + "\n"; resultText += "Healthy BMI Range: " + bmiRangeDiv.textContent + "\n\n"; resultText += "Formula Assumptions:\n"; resultText += "- Calculation based on height, sex, and estimated body frame.\n"; resultText += "- Provides a healthy weight *range*, not a single target number.\n"; resultText += "- BMI equivalencies are approximate.\n"; var textArea = document.createElement("textarea"); textArea.value = resultText; document.body.appendChild(textArea); textArea.select(); try { document.execCommand("copy"); alert("Results copied to clipboard!"); } catch (err) { console.error("Unable to copy results: ", err); alert("Failed to copy results."); } document.body.removeChild(textArea); } // Event Listeners heightCmInput.addEventListener('input', calculateIdealWeight); sexInput.addEventListener('change', calculateIdealWeight); bodyFrameInput.addEventListener('change', calculateIdealWeight); calculateBtn.addEventListener('click', calculateIdealWeight); resetBtn.addEventListener('click', resetCalculator); // Initial calculations and table population on load document.addEventListener('DOMContentLoaded', function() { // Load initial sensible defaults and calculate resetCalculator(); // This will call calculateIdealWeight internally via the event listeners if they are set up correctly, or we can call it explicitly calculateIdealWeight(); // Call explicitly to ensure chart and table are updated based on defaults // Need to ensure chart drawing is done AFTER canvas element is ready and potentially after initial calculation var initialHeight = parseFloat(heightCmInput.value); var initialSex = sexInput.value; var initialFrame = bodyFrameInput.value; var initialLower = parseFloat(lowerBoundDiv.textContent); var initialUpper = parseFloat(upperBoundDiv.textContent); var initialBmiLower = parseFloat(bmiRangeDiv.textContent.split(' – ')[0]); var initialBmiUpper = parseFloat(bmiRangeDiv.textContent.split(' – ')[1]); updateChart(initialHeight, initialLower, initialUpper, initialBmiLower, initialBmiUpper); populateTable(initialHeight, initialSex, initialFrame); }); // FAQ Toggle Function function toggleFaq(element) { var faqItem = element.closest('.faq-item'); faqItem.classList.toggle('open'); } // Simple polyfill for Chart.js context if needed, or use native canvas API directly. // For this example, we are drawing directly onto canvas. // To make the chart dynamic, we need a simple way to redraw or update. // We'll redraw the entire chart in updateChart function. var canvas = document.getElementById('weightChart'); // Ensure we have a context to draw on if (!canvas.getContext) { console.error("Canvas not supported by your browser."); } else { // Initial chart draw after DOM is ready and initial values are set document.addEventListener('DOMContentLoaded', function() { calculateIdealWeight(); // Trigger calculation to set initial values and chart/table }); } // Re-calculate on resize to adjust chart width window.addEventListener('resize', function() { if (weightChartInstance) { // If we had a chart instance that supports resize // weightChartInstance.resize(); // Example if using a library } // For pure canvas, we need to redraw var currentHeight = parseFloat(heightCmInput.value); var currentLower = parseFloat(lowerBoundDiv.textContent); var currentUpper = parseFloat(upperBoundDiv.textContent); var currentBmiLower = parseFloat(bmiRangeDiv.textContent.split(' – ')[0]); var currentBmiUpper = parseFloat(bmiRangeDiv.textContent.split(' – ')[1]); updateChart(currentHeight, currentLower, currentUpper, currentBmiLower, currentBmiUpper); });

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