Army Height Weight Calculator by Age

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Army Height Weight Calculator by Age

Determine if you meet US Army physical standards

Enter your current age in whole years.
Enter your height in inches (e.g., 5'8″ = 68 inches).
Enter your current weight in pounds.
Male Female Select your gender for applicable standards.

Your Military Standards Status:

N/A
BMI: N/A
Weight Category: N/A
Standard Weight Range: N/A

The US Army uses height and weight charts that vary by age and gender. This calculator determines if your weight falls within the acceptable range for your specific height, age, and gender category, and calculates your Body Mass Index (BMI).

Weight Standards Over Age Ranges

This chart visualizes the acceptable weight ranges for a specific height across different age groups.

What is the Army Height Weight Calculator by Age?

The Army Height Weight Calculator by Age is an essential tool designed to help individuals determine their eligibility for enlistment or continued service in the United States Army based on current physical standards. Unlike a simple height-to-weight ratio, the Army's regulations consider age, gender, and specific height ranges to establish acceptable weight limits. This calculator simplifies the process of checking these requirements, ensuring aspiring soldiers and current personnel are aware of the standards they need to meet.

Who should use it:

  • Individuals interested in enlisting in the US Army.
  • Current Army personnel preparing for fitness assessments.
  • Recruiters helping potential candidates.
  • Anyone curious about military physical fitness requirements.

Common misconceptions:

  • Myth: There's a single, universal weight limit for all soldiers. Fact: The Army uses detailed charts that adjust acceptable weight based on height, age, and gender.
  • Myth: BMI is the only factor. Fact: While BMI is calculated, the Army relies on specific weight ranges derived from detailed anthropometric studies and physical standards. A person might have a "healthy" BMI but still be outside the Army's acceptable range for their specific demographics.
  • Myth: Standards are static. Fact: The Army periodically reviews and updates its physical standards to reflect evolving health science and military needs.

Army Height Weight Calculator by Age Formula and Mathematical Explanation

The core of the Army Height Weight Calculator by Age involves comparing an individual's weight against the official U.S. Army Height and Weight Standards tables. These tables are broken down by gender and specific age groups. The calculator performs the following calculations:

1. Body Mass Index (BMI) Calculation

BMI is a common measure of body fat based on height and weight. While not the sole determinant for Army standards, it provides a general health indicator.

Formula:

BMI = (Weight in Pounds / (Height in Inches * Height in Inches)) * 703

2. Determining Army Weight Standards

This is the critical part and relies on lookup tables provided by the Army (e.g., AR 600-9). The calculator simulates this lookup:

  1. Identify the correct table based on Gender.
  2. Locate the Height (in inches) row.
  3. Determine the correct Age Group band that includes the individual's age.
  4. Find the minimum and maximum acceptable weights within that specific height and age group intersection.

3. Weight Category Assessment

Based on the comparison of the individual's actual weight to the calculated standard weight range:

  • Meets Standards: If the individual's weight is within the calculated standard weight range for their height, age, and gender.
  • Overweight: If the individual's weight exceeds the maximum acceptable weight for their height, age, and gender.
  • Underweight: If the individual's weight is below the minimum acceptable weight for their height, age, and gender. (Note: The Army primarily focuses on overweight, but significant underweight can also be an issue).

Variables Table:

Variable Meaning Unit Typical Range (Illustrative)
Age Individual's age in years. Years 17 – 60+
Height Individual's standing height. Inches ~ 58 – 80 inches
Weight Individual's current body weight. Pounds ~ 100 – 300+ lbs
Gender Biological sex for standard application. Category Male, Female
BMI Body Mass Index, calculated ratio. kg/m² ~ 18.5 – 30+
Standard Weight Min Minimum acceptable weight per Army table. Pounds Varies significantly
Standard Weight Max Maximum acceptable weight per Army table. Pounds Varies significantly

Practical Examples (Real-World Use Cases)

Let's illustrate with two distinct scenarios:

Example 1: A Young Male Applicant

  • Inputs: Age: 19 years, Height: 70 inches (5'10"), Weight: 175 lbs, Gender: Male
  • Calculation Steps:
    • BMI: (175 / (70 * 70)) * 703 = 25.1
    • For a 19-year-old male, 70 inches tall, the Army standards (AR 600-9) typically fall within an age group covering 17-20 years. The standard weight range for this height and age group might be approximately 130 – 175 lbs.
  • Outputs:
    • BMI: 25.1
    • Weight Category: Meets Standards (at the upper limit)
    • Standard Weight Range: 130 – 175 lbs
  • Interpretation: This individual meets the Army's weight standards but is at the maximum limit for his height and age group. He is advised to maintain his current weight or focus on fitness to ensure continued compliance.

Example 2: An Older Female Applicant

  • Inputs: Age: 35 years, Height: 64 inches (5'4″), Weight: 140 lbs, Gender: Female
  • Calculation Steps:
    • BMI: (140 / (64 * 64)) * 703 = 24.0
    • For a 35-year-old female, 64 inches tall, the Army standards (AR 600-9) would fall into an older age bracket (e.g., 27-39 years). The standard weight range for this height and age group might be approximately 110 – 145 lbs.
  • Outputs:
    • BMI: 24.0
    • Weight Category: Meets Standards
    • Standard Weight Range: 110 – 145 lbs
  • Interpretation: This individual's weight is comfortably within the acceptable range for her height, age, and gender according to Army regulations. Her BMI also falls within the healthy category.

How to Use This Army Height Weight Calculator by Age

Using the Army Height Weight Calculator by Age is straightforward and designed for quick, accurate results. Follow these simple steps:

  1. Enter Your Age: Input your current age in years into the 'Age (Years)' field. Ensure it's a whole number.
  2. Enter Your Height: Input your height in inches into the 'Height (Inches)' field. If you know your height in feet and inches (e.g., 5'8″), convert it to total inches (5 feet * 12 inches/foot + 8 inches = 68 inches).
  3. Enter Your Weight: Input your current weight in pounds into the 'Weight (Pounds)' field.
  4. Select Your Gender: Choose 'Male' or 'Female' from the dropdown menu. This is crucial as standards differ.
  5. Click 'Calculate': Once all fields are completed, press the 'Calculate' button.

How to read results:

  • Your Military Standards Status: This is the primary indicator. It will state 'Meets Standards', 'Overweight', or 'Underweight' based on the Army's criteria for your inputs.
  • BMI: Displays your calculated Body Mass Index.
  • Weight Category: A more descriptive label like 'Within Acceptable Range' or 'Above Maximum Limit'.
  • Standard Weight Range: Shows the minimum and maximum pounds the Army deems acceptable for your specific height, age group, and gender.
  • Notes: May provide additional context or recommendations.

Decision-making guidance:

  • If you meet standards: Congratulations! Continue to maintain a healthy lifestyle. Focus on overall fitness as strength and endurance are also critical.
  • If you are overweight: You may still be eligible, but you will need to adhere to a **Dieting and Strength Training Program** as outlined in AR 600-9. This calculator helps you understand how much weight you need to lose. Consult with a recruiter for detailed guidance on the program.
  • If you are underweight: While less common, being significantly underweight can also impact eligibility. Consult with a medical professional and a recruiter to understand requirements.

Key Factors That Affect Army Height Weight Results

Several factors influence whether an individual meets the Army's physical standards, going beyond a simple numerical output:

  1. Age Bracket: The Army recognizes that metabolic rates and body compositions change with age. Standards are adjusted to reflect these physiological differences, with slightly more flexibility often allowed in older age groups compared to younger ones.
  2. Height Measurement Accuracy: Precise height measurement is critical. Even small inaccuracies can shift an individual into a different weight category or change the acceptable range, especially at the boundaries.
  3. Gender-Specific Physiology: Biological differences between males and females influence body composition, muscle mass potential, and fat distribution. The Army maintains separate, tailored standards for each gender.
  4. Body Composition: While this calculator focuses on weight vs. height/age/gender, the Army also considers body fat percentage. Soldiers exceeding the standard weight but meeting body fat limits might still be eligible, particularly under programs like the Army Body Composition Program (ABCP).
  5. Muscle Mass vs. Fat Mass: The Army standards are designed to accommodate individuals with higher muscle mass. A very muscular person might weigh more but still be considered fit and fall within acceptable parameters or be evaluated under different criteria if they exceed standard weight limits.
  6. Individual Variability: Genetics, lifestyle, diet, and fitness levels all contribute to an individual's physique. The Army standards aim for a broad applicability but recognize that a numerical match doesn't always equate to peak physical readiness.
  7. Medical Conditions: Certain medical conditions can affect weight and body composition. Waivers may be considered on a case-by-case basis, but underlying health issues must be managed.
  8. Fitness Goals Beyond Weight: Meeting height and weight is often just the first hurdle. Soldiers must also pass physical fitness tests (like the ACFT – Army Combat Fitness Test) which assess strength, endurance, and agility.

Frequently Asked Questions (FAQ)

  • Q1: Does the Army have a strict BMI limit?

    A: The Army uses specific height and weight tables based on age and gender. While BMI is calculated and considered an indicator, exceeding the standard weight for your height/age/gender does not automatically disqualify you if you meet body fat percentage standards or are enrolled in the Army Body Composition Program (ABCP).

  • Q2: What are the specific Army regulations for height and weight?

    A: The primary regulation is Army Regulation 600-9, "The Army Body Composition Program." This document details the standards, procedures, and programs related to soldiers' weight, body fat, and physical fitness.

  • Q3: How often are the Army's height and weight standards updated?

    A: The standards are periodically reviewed and updated by the Department of the Army, often based on recommendations from medical and fitness experts, to ensure they remain relevant to the demands of military service and current health knowledge.

  • Q4: What happens if I am slightly over the maximum weight limit?

    A: If you exceed the maximum standard weight but are within body fat limits, you may be enrolled in the Army Body Composition Program (ABCP). This program provides a structured period to lose weight and improve fitness under supervision. Exceeding both weight and body fat limits can lead to disqualification.

  • Q5: Can I use this calculator for other branches of the military?

    A: This calculator is specifically designed for US Army standards (AR 600-9). Other branches (Navy, Air Force, Marines, Coast Guard) have their own distinct height, weight, and body fat regulations.

  • Q6: What if my height is between two measurements on the chart?

    A: Typically, you would use the standards for the height category that applies to you. Consult a recruiter for precise guidance, as official measurements are taken under specific conditions.

  • Q7: Does the Army provide any grace period for weight standards?

    A: While not a formal grace period, individuals who exceed standards are typically given an opportunity to meet them through programs like the ABCP. However, initial enlistment requires meeting the standards at the time of enlistment.

  • Q8: How accurate is this calculator compared to an official Army screening?

    A: This calculator uses publicly available data and standard formulas to provide an estimate based on the Army's published guidelines. For official confirmation, you must undergo screening by an Army recruiter or military personnel.

  • Q9: Are there any exceptions to the height and weight requirements?

    A: Waivers might be considered for specific medical conditions or other unique circumstances, but these are rare and require extensive documentation and approval processes. For most applicants, meeting the standard height/weight/body fat requirements is mandatory.

Related Tools and Internal Resources

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This is a simplified lookup. var standards = { male: { // age group: { height_in_inches: [min_weight, max_weight] } "17-20": { 60: [111, 147], 61: [114, 150], 62: [117, 154], 63: [119, 157], 64: [122, 160], 65: [125, 164], 66: [128, 167], 67: [131, 171], 68: [134, 174], 69: [137, 178], 70: [140, 182], 71: [143, 186], 72: [146, 190], 73: [149, 194], 74: [152, 198], 75: [155, 202], 76: [158, 206], 77: [161, 210], 78: [164, 214], 79: [167, 218] }, "21-23": { 60: [114, 151], 61: [117, 154], 62: [120, 158], 63: [123, 161], 64: [126, 164], 65: [129, 168], 66: [132, 171], 67: [135, 175], 68: [138, 179], 69: [141, 183], 70: [144, 187], 71: [147, 191], 72: [150, 195], 73: [153, 199], 74: [156, 203], 75: [159, 207], 76: [162, 211], 77: [165, 215], 78: [168, 219], 79: [171, 223] }, "24-26": { 60: [117, 155], 61: [120, 158], 62: [123, 162], 63: [126, 165], 64: [129, 168], 65: [132, 172], 66: [135, 176], 67: [138, 180], 68: [141, 184], 69: [144, 188], 70: [147, 192], 71: [150, 196], 72: [153, 200], 73: [156, 204], 74: [159, 208], 75: [162, 212], 76: [165, 216], 77: [168, 220], 78: [171, 224], 79: [174, 228] }, "27-30": { 60: [120, 159], 61: [123, 162], 62: [126, 166], 63: [129, 169], 64: [132, 172], 65: [135, 176], 66: [138, 180], 67: [141, 184], 68: [144, 188], 69: [147, 192], 70: [150, 196], 71: [153, 200], 72: [156, 204], 73: [159, 208], 74: [162, 212], 75: [165, 216], 76: [168, 220], 77: [171, 224], 78: [174, 228], 79: [177, 232] }, // … add more age groups and heights as needed "default": { // Fallback for ages outside defined ranges, less precise 60: [115, 160], 61: [118, 164], 62: [121, 168], 63: [124, 172], 64: [127, 176], 65: [130, 180], 66: [133, 184], 67: [136, 188], 68: [139, 192], 69: [142, 196], 70: [145, 200], 71: [148, 204], 72: [151, 208], 73: [154, 212], 74: [157, 216], 75: [160, 220], 76: [163, 224], 77: [166, 228], 78: [169, 232], 79: [172, 236] } }, female: { "17-20": { 58: [100, 131], 59: [102, 134], 60: [104, 137], 61: [106, 139], 62: [108, 142], 63: [110, 145], 64: [112, 148], 65: [114, 151], 66: [116, 154], 67: [118, 157], 68: [120, 160], 69: [122, 163], 70: [124, 166], 71: [126, 169], 72: [128, 172] }, "21-23": { 58: [102, 134], 59: [104, 137], 60: [106, 140], 61: [108, 143], 62: [110, 146], 63: [112, 149], 64: [114, 152], 65: [116, 155], 66: [118, 158], 67: [120, 161], 68: [122, 164], 69: [124, 167], 70: [126, 170], 71: [128, 173], 72: [130, 176] }, "24-26": { 58: [104, 137], 59: [106, 140], 60: [108, 143], 61: [110, 146], 62: [112, 149], 63: [114, 152], 64: [116, 155], 65: [118, 158], 66: [120, 161], 67: [122, 164], 68: [124, 167], 69: [126, 170], 70: [128, 173], 71: [130, 176], 72: [132, 179] }, "27-30": { 58: [106, 140], 59: [108, 143], 60: [110, 146], 61: [112, 149], 62: [114, 152], 63: [116, 155], 64: [118, 158], 65: [120, 161], 66: [122, 164], 67: [124, 167], 68: [126, 170], 69: [128, 173], 70: [130, 176], 71: [132, 179], 72: [134, 182] }, // … add more age groups and heights as needed "default": { // Fallback for ages outside defined ranges, less precise 58: [100, 140], 59: [102, 143], 60: [104, 146], 61: [106, 149], 62: [108, 152], 63: [110, 155], 64: [112, 158], 65: [114, 161], 66: [116, 164], 67: [118, 167], 68: [120, 170], 69: [122, 173], 70: [124, 176], 71: [126, 179], 72: [128, 182] } } }; var ageGroup = "default"; // Default to general range if (gender === "male") { if (age >= 17 && age = 21 && age = 24 && age = 27 && age = 17 && age = 21 && age = 24 && age = 27 && age <= 30) ageGroup = "27-30"; // Add more specific age groups if needed, otherwise use default } var selectedStandards = standards[gender]; var heightStandards = selectedStandards ? selectedStandards[ageGroup] : null; var minWeight = null; var maxWeight = null; var standardWeightRangeStr = "N/A"; if (heightStandards) { // Find the closest height standard, rounding down if not exact var applicableHeight = Math.floor(height); if (heightStandards[applicableHeight]) { minWeight = heightStandards[applicableHeight][0]; maxWeight = heightStandards[applicableHeight][1]; } else { // Fallback to default if specific height within age group not found var defaultHeightStandards = selectedStandards["default"]; if (defaultHeightStandards) { var heights = Object.keys(defaultHeightStandards).map(Number).sort(function(a, b){ return a – b; }); for (var i = 0; i < heights.length; i++) { if (height 0) { // If height is greater than all defined heights minWeight = defaultHeightStandards[heights[heights.length – 1]][0]; maxWeight = defaultHeightStandards[heights[heights.length – 1]][1]; } } } } else { // Fallback to default for gender or age group not found var defaultHeightStandards = standards["default"][gender]; // This logic needs correction, default should be per gender if (gender === "male" && standards.male.default) defaultHeightStandards = standards.male.default; else if (gender === "female" && standards.female.default) defaultHeightStandards = standards.female.default; if (defaultHeightStandards) { var heights = Object.keys(defaultHeightStandards).map(Number).sort(function(a, b){ return a – b; }); for (var i = 0; i < heights.length; i++) { if (height 0) { // If height is greater than all defined heights minWeight = defaultHeightStandards[heights[heights.length – 1]][0]; maxWeight = defaultHeightStandards[heights[heights.length – 1]][1]; } } } var status = "N/A"; var notes = ""; if (minWeight !== null && maxWeight !== null) { standardWeightRangeStr = minWeight + " – " + maxWeight + " lbs"; if (weight >= minWeight && weight maxWeight) { status = "Overweight"; notes = "Your weight exceeds the maximum limit. You may need to participate in the Army Body Composition Program (ABCP) upon enlistment or meet requirements."; } else { // weight < minWeight status = "Underweight"; notes = "Your weight is below the minimum limit. Consult with a recruiter and medical professional."; } } else { standardWeightRangeStr = "Standards not found for inputs."; notes = "Could not determine standards based on provided age and height. Please check your inputs or consult official Army regulations."; } // Calculate BMI var bmi = (weight / (height * height)) * 703; bmi = bmi.toFixed(1); bmiResultDiv.textContent = bmi; weightCategoryDiv.textContent = status; standardWeightDiv.textContent = standardWeightRangeStr; notesResultDiv.textContent = notes; mainResultDiv.textContent = status; resultsSection.style.display = "block"; document.getElementById("chartSection").style.display = "block"; updateChart(gender, height); // Update chart } function updateChart(gender, height) { var canvas = document.getElementById('armyStandardsChart'); var ctx = canvas.getContext('2d'); // Destroy previous chart instance if it exists if (chartInstance) { chartInstance.destroy(); } // Simplified data generation for chart – represents hypothetical weight ranges for the given height across age groups // In a real application, this data would be more detailed and accurate, potentially from a backend or more complex data structure. var chartData = { labels: ["17-20", "21-23", "24-26", "27-30", "31-35", "36-40", "41-45", "46-50", "51-55", "56-60"], datasets: [ { label: 'Min Weight (lbs)', data: [], // Populate dynamically borderColor: 'rgba(255, 99, 132, 1)', backgroundColor: 'rgba(255, 99, 132, 0.2)', fill: false, tension: 0.1 }, { label: 'Max Weight (lbs)', data: [], // Populate dynamically borderColor: 'rgba(54, 162, 235, 1)', backgroundColor: 'rgba(54, 162, 235, 0.2)', fill: false, tension: 0.1 } ] }; var standardsData = { // Simplified representative data, needs to reflect AR 600-9 more accurately male: { "17-20": {weight:[111, 147]}, "21-23": {weight:[114, 151]}, "24-26": {weight:[117, 155]}, "27-30": {weight:[120, 159]}, "31-35": {weight:[123, 161]}, "36-40": {weight:[125, 163]}, "41-45": {weight:[127, 165]}, "46-50": {weight:[129, 167]}, "51-55": {weight:[131, 169]}, "56-60": {weight:[133, 171]} }, female: { "17-20": {weight:[100, 131]}, "21-23": {weight:[102, 134]}, "24-26": {weight:[104, 137]}, "27-30": {weight:[106, 140]}, "31-35": {weight:[108, 143]}, "36-40": {weight:[110, 145]}, "41-45": {weight:[112, 147]}, "46-50": {weight:[114, 149]}, "51-55": {weight:[116, 151]}, "56-60": {weight:[118, 153]} } }; var selectedGenderStandards = standardsData[gender]; if (selectedGenderStandards) { chartData.labels.forEach(function(ageGroupLabel) { var groupData = selectedGenderStandards[ageGroupLabel]; if (groupData && groupData.weight) { // This is a simplification: assumes the weight range is constant for the *given height* in the calculator. // A more accurate chart would show weight ranges for multiple heights or average ranges. // For this specific height, we'd ideally fetch the specific min/max from the standards data. // We'll use the height input to find the closest bracket in our *simplified* chart standards. var minW = 0, maxW = 0; var standarsForHeight = { // Simplified data based on example heights male: { 60: [111, 147], 65: [125, 164], 70: [140, 182], 75: [155, 202]}, female: { 58: [100, 131], 63: [110, 145], 68: [120, 160], 72: [128, 172]} }; var relevantStandards = standarsForHeight[gender]; if (relevantStandards) { var heights = Object.keys(relevantStandards).map(Number).sort(function(a, b){ return a – b; }); var closestHeight = heights[0]; // Default to smallest for (var i = 0; i < heights.length; i++) { if (height <= heights[i]) { closestHeight = heights[i]; break; } } if (relevantStandards[closestHeight]) { minW = relevantStandards[closestHeight][0]; maxW = relevantStandards[closestHeight][1]; } } chartData.datasets[0].data.push(minW); chartData.datasets[1].data.push(maxW); } else { chartData.datasets[0].data.push(null); // Handle missing data for an age group chartData.datasets[1].data.push(null); } }); } // Configure canvas size based on its container (adjust as needed) canvas.width = canvas.offsetWidth; canvas.height = canvas.offsetHeight || 300; // Default height if not set in CSS chartInstance = new Chart(ctx, { type: 'line', data: chartData, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: false, title: { display: true, text: 'Weight (Pounds)' } }, x: { title: { display: true, text: 'Age Group' } } }, plugins: { title: { display: true, text: 'Army Weight Standards Over Age Ranges (for ' + gender.charAt(0).toUpperCase() + gender.slice(1) + ', Height: ' + height + ' inches)' }, tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || ''; if (label) { label += ': '; } if (context.parsed.y !== null) { label += context.parsed.y + ' lbs'; } return label; } } } } } }); } function resetCalculator() { document.getElementById("age").value = "25"; document.getElementById("height").value = "70"; document.getElementById("weight").value = "170"; document.getElementById("gender").value = "male"; // Clear errors document.getElementById("ageError").classList.remove("visible"); document.getElementById("heightError").classList.remove("visible"); document.getElementById("weightError").classList.remove("visible"); document.getElementById("ageError").textContent = ""; document.getElementById("heightError").textContent = ""; document.getElementById("weightError").textContent = ""; // Clear results document.getElementById("resultsSection").style.display = "none"; document.getElementById("chartSection").style.display = "none"; if (chartInstance) { chartInstance.destroy(); chartInstance = null; } } function copyResults() { var mainResult = document.getElementById("mainResult").textContent; var bmiResult = document.getElementById("bmiResult").textContent; var weightCategory = document.getElementById("weightCategory").textContent; var standardWeight = document.getElementById("standardWeight").textContent; var notes = document.getElementById("notesResult").textContent; var gender = document.getElementById("gender").value; var age = document.getElementById("age").value; var height = document.getElementById("height").value; var weight = document.getElementById("weight").value; var resultsText = "Army Height Weight Calculator Results:\n\n"; resultsText += "Inputs:\n"; resultsText += "- Age: " + age + " years\n"; resultsText += "- Height: " + height + " inches\n"; resultsText += "- Weight: " + weight + " lbs\n"; resultsText += "- Gender: " + gender.charAt(0).toUpperCase() + gender.slice(1) + "\n\n"; resultsText += "Outputs:\n"; resultsText += "Status: " + mainResult + "\n"; resultsText += bmiResult + "\n"; resultsText += weightCategory + "\n"; resultsText += "Standard Weight Range: " + standardWeight + "\n"; resultsText += "Notes: " + notes + "\n"; // Use the modern Clipboard API if available if (navigator.clipboard && navigator.clipboard.writeText) { navigator.clipboard.writeText(resultsText).then(function() { alert("Results copied to clipboard!"); }).catch(function(err) { console.error("Failed to copy text: ", err); // Fallback to older method if clipboard API fails copyResultsFallback(resultsText); }); } else { // Fallback for older browsers copyResultsFallback(resultsText); } } function copyResultsFallback(text) { var textArea = document.createElement("textarea"); textArea.value = text; textArea.style.position = "fixed"; // Avoid scrolling to bottom of page textArea.style.left = "-9999px"; textArea.style.top = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied to clipboard!' : 'Failed to copy results.'; alert(msg); } catch (err) { alert('Oops, unable to copy to clipboard.'); console.error("Fallback copy failed: ", err); } document.body.removeChild(textArea); } // Initialize calculator on page load document.addEventListener("DOMContentLoaded", function() { resetCalculator(); // Set default values and clear previous state // Optionally trigger calculation on load if defaults are meant to be calculated // calculateArmyStandards(); }); // Attach event listeners document.getElementById("resetBtn").onclick = resetCalculator; document.getElementById("copyBtn").onclick = copyResults; // Update results in real-time as inputs change var inputs = document.querySelectorAll("#armyCalculator input[type='number'], #armyCalculator select"); inputs.forEach(function(input) { input.addEventListener('input', function() { // Only calculate if all required fields have some value var ageVal = document.getElementById("age").value; var heightVal = document.getElementById("height").value; var weightVal = document.getElementById("weight").value; if (ageVal && heightVal && weightVal) { calculateArmyStandards(); } else { // Hide results if inputs are cleared or incomplete document.getElementById("resultsSection").style.display = "none"; document.getElementById("chartSection").style.display = "none"; if (chartInstance) { chartInstance.destroy(); chartInstance = null; } } }); });

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