Army Height and Weight Calculator – APFT Standards
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Army Height and Weight Calculator
Calculation Results
—
**Formula:** The Army height and weight standards are based on age and gender to determine acceptable weight ranges and body fat percentages. Values are derived from official AR 600-9 regulations.
Army Weight Standards (Example Range)
| Height (in) |
Gender |
Min Weight (lbs) |
Max Weight (lbs) |
Body Fat Limit (%) |
What is the Army Height and Weight Calculator?
The Army height and weight calculator is a specialized tool designed to help individuals determine if they meet the U.S. Army's body composition standards, as outlined in AR 600-9. This isn't just about hitting a number on a scale; it's about maintaining a certain level of physical readiness and adherence to military regulations. Soldiers must fall within a prescribed weight range for their height, gender, and age group. For those who fall outside these limits, body fat percentage measurements are used as a secondary standard. This army ht weight calculator simplifies the process of checking these requirements, offering quick insights into compliance.
Who should use it:
- Prospective Army recruits needing to gauge their eligibility.
- Current soldiers wanting to ensure they remain within standards.
- Fitness enthusiasts interested in military body composition benchmarks.
- Military recruiters and leaders for quick assessments.
Common misconceptions:
- Myth: The Army only cares about weight. Reality: Body fat percentage is a critical factor, especially for those slightly outside the weight range.
- Myth: The standards are identical for all soldiers. Reality: Standards vary by gender and age group, reflecting physiological differences.
- Myth: Meeting the standard is a one-time check. Reality: Soldiers must maintain these standards throughout their service.
Army Height and Weight Calculator Formula and Mathematical Explanation
The Army height and weight calculator utilizes data tables and accepted military formulas derived from AR 600-9, the Army Body Composition Program. While the exact mathematical derivation can be complex, involving statistical analysis of healthy populations and physical demands, the calculator simplifies it into practical applications based on official tables. The core principle is to establish weight ranges that support combat readiness and good health.
The calculator typically takes the following inputs:
Variables Used:
| Variable Name |
Meaning |
Unit |
Typical Range |
| Height (H) |
Soldier's measured height |
Inches (in) |
48 – 80 inches (4'0″ – 6'8″) |
| Weight (W) |
Soldier's measured weight |
Pounds (lbs) |
50 – 350+ lbs |
| Gender (G) |
Biological sex of the soldier |
Categorical (Male/Female) |
Male or Female |
| Age (A) |
Soldier's age in years |
Years |
17 – 65+ years |
Calculation Logic:
- Height Input: The calculator first validates the provided height in inches.
- Gender and Age Grouping: Based on the soldier's gender and age, the calculator accesses the relevant section of the AR 600-9 standard tables. The Army often categorizes soldiers into age groups (e.g., 17-20, 21-23, 24-32, 33-42, 43-54, 55+).
- Weight Range Determination: For the specific height, gender, and age bracket, the calculator identifies the minimum and maximum allowable weights.
- Body Fat Percentage (Secondary Standard): If a soldier's weight falls between the minimum and maximum acceptable limits, they are considered compliant. However, if a soldier exceeds the maximum allowable weight for their height but is within certain limits, they may still be compliant if their body fat percentage is below the specified threshold for their gender and age group. The calculator estimates this or flags it if the input weight is significantly above the maximum. The Army uses specific measurement techniques (e.g., tape measures at neck, waist, hips) for official body fat assessment.
The primary output of the army ht weight calculator is whether the soldier is within the acceptable weight range. It also provides the minimum and maximum weights for context and flags potential issues regarding body fat percentage if the weight is high.
Practical Examples (Real-World Use Cases)
Understanding the Army height and weight calculator is best done through practical scenarios. Here are a couple of examples demonstrating its use:
-
Example 1: A Young Male Soldier
Scenario: SPC John Smith is 22 years old, male, 70 inches (5'10") tall, and weighs 190 lbs. He is concerned about meeting the Army's standards.
Inputs:
- Height: 70 inches
- Weight: 190 lbs
- Gender: Male
- Age: 22
Calculator Output:
- Primary Result: Within Standards (or slightly above, depending on exact table)
- Min Weight: Approx. 140 lbs
- Max Weight: Approx. 185 lbs
- Body Fat %: (Indicates calculation would need official measurement if over max weight)
Financial Interpretation: SPC Smith is currently 5 lbs over the maximum weight for his height and age group. While this is a small margin, he would need to take steps to reduce his weight to the maximum of 185 lbs to be fully compliant without further testing. Failure to meet body composition standards can impact promotions and career progression within the military fitness standards framework.
-
Example 2: A Female Soldier Nearing Maximum
Scenario: SFC Jane Doe is 38 years old, female, 64 inches (5'4″) tall, and weighs 145 lbs. She wants to verify her status.
Inputs:
- Height: 64 inches
- Weight: 145 lbs
- Gender: Female
- Age: 38
Calculator Output:
- Primary Result: Within Standards
- Min Weight: Approx. 107 lbs
- Max Weight: Approx. 147 lbs
- Body Fat %: (Within limits)
Financial Interpretation: SFC Doe is within the acceptable weight range (107-147 lbs). Her weight of 145 lbs is close to the maximum, but still compliant. This highlights how the army ht weight calculator can provide reassurance. Regular monitoring is still advisable, as maintaining fitness is key for career advancement and potential deployment opportunities, which are tied to overall readiness and compliance with Army Physical Fitness Test requirements.
How to Use This Army Height and Weight Calculator
Using the Army height and weight calculator is straightforward. Follow these steps to get accurate results:
- Step 1: Gather Accurate Measurements. Ensure you have your precise height in inches and your current weight in pounds. If you only know your height in feet and inches (e.g., 5'8″), convert it to inches (5 feet * 12 inches/foot + 8 inches = 68 inches).
- Step 2: Select Gender and Enter Age. Choose your gender (Male/Female) from the dropdown and enter your age in years.
- Step 3: Input Data. Enter your height (in inches) and weight (in lbs) into the respective fields.
- Step 4: View Results. The calculator will automatically update the results section.
Interpreting Results:
- Primary Result: This will clearly state whether you are "Within Standards," "Below Minimum Weight," or "Above Maximum Weight."
- Min/Max Weight: These values show the acceptable weight range for your height, gender, and age group.
- Body Fat %: This field is often indicative. If you are above the maximum weight but within a certain buffer, the Army uses body fat percentage as a secondary measure. Official measurements are required for this.
Decision-Making Guidance:
- Within Standards: Congratulations! Continue to maintain your current fitness level.
- Below Minimum Weight: You may need to focus on healthy weight gain strategies, consulting with a nutritionist or medical professional.
- Above Maximum Weight: You need to focus on weight reduction. Aim to get within the maximum weight limit. If you are slightly over, focus on reaching the max weight. If you are significantly over, be aware that body fat percentage becomes crucial, and official measurements are required. AR 600-9 provides clear guidelines on mandatory testing and counseling if standards are not met.
Remember, consistent physical training and a healthy diet are essential for meeting and exceeding the Army physical fitness requirements.
Key Factors That Affect Army Height and Weight Results
Several factors influence the results generated by an Army height and weight calculator and the underlying military standards. Understanding these is crucial for a comprehensive view:
-
Age: Metabolism tends to slow with age, and the Army recognizes this by adjusting weight standards upward for older age groups. This acknowledges natural physiological changes.
-
Gender: Biological differences in body composition (muscle mass, bone density, fat distribution) mean that men and women have different standard weight and body fat percentage requirements.
-
Height: Taller individuals naturally require more mass to maintain function, so weight standards increase proportionally with height.
-
Muscle Mass vs. Fat Mass: While the calculator primarily uses total weight, the Army's secondary standard (body fat percentage) accounts for body composition. A very muscular individual might exceed the weight limit but still be compliant if they have low body fat. The calculator flags this potential discrepancy.
-
Genetics: Individual genetic makeup plays a role in metabolism, body type, and predisposition to storing fat, influencing how easily one can meet the standards.
-
Diet and Nutrition: Caloric intake and the quality of food consumed directly impact body weight and body fat levels. A balanced, healthy diet is key for maintaining standards.
-
Physical Activity Level: Regular exercise, including cardiovascular and strength training, helps manage weight, build muscle, and improve overall physical conditioning, which supports meeting the Army APFT calculator benchmarks.
-
Medical Conditions and Medications: Certain health issues or prescribed medications can affect weight and metabolism, sometimes necessitating waivers or profile adjustments under specific circumstances, though standards must still be met.
Frequently Asked Questions (FAQ)
What is the primary standard for Army height and weight?
The primary standard is to fall within the acceptable weight range for your specific height, gender, and age group, as defined by AR 600-9.
What happens if I exceed the maximum weight?
If you exceed the maximum weight but are within a specified buffer range, you will be evaluated using body fat percentage measurements. If you exceed both the weight limit and the body fat percentage limit, you will be enrolled in the Army Body Composition Program (ABC_P).
Are the standards different for males and females?
Yes, the Army's height and weight standards, as well as body fat percentage limits, differ significantly between males and females due to physiological differences.
How often are soldiers tested for height and weight?
Soldiers are typically screened for height and weight monthly during the Army Physical Fitness Test (APFT) or Army Combat Fitness Test (ACFT). If a soldier fails to meet the standards, they are managed under the ABC_P.
Can I use this calculator for the ACFT?
Can I use this calculator for the ACFT?
This calculator specifically addresses the height and weight body composition standards (AR 600-9), not the performance standards of the ACFT or APFT events (run, push-ups, sit-ups). However, maintaining optimal body composition is crucial for ACFT/APFT performance.
What are the body fat percentage limits?
Body fat percentage limits vary by age and gender. For example, for males aged 17-20, the limit is 20%; for females aged 17-20, it's 30%. These limits increase slightly with age. Always refer to the latest AR 600-9 for precise figures.
What if I have a medical condition affecting my weight?
Soldiers with diagnosed medical conditions or on medication that affects body weight may be eligible for a temporary medical profile or a Permanent Profile (a profile is a medical determination). However, they must still meet the standards or have an approved waiver. This calculator does not account for medical conditions.
Does height and weight affect promotion potential?
Yes, consistently meeting Army standards, including height and weight, is a baseline requirement for career progression and promotion. Failing to meet these standards can halt promotions and impact opportunities for reenlistment or special assignments.
Related Tools and Internal Resources
Explore More Army Resources
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var ctx = document.getElementById("htWeightChart").getContext("2d");
var htWeightChart;
var chartData = {
labels: [], // Will be populated dynamically
datasets: [{
label: 'Min Allowable Weight (lbs)',
data: [], // Will be populated dynamically
borderColor: 'rgba(255, 99, 132, 1)',
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fill: false,
borderWidth: 2
}, {
label: 'Max Allowable Weight (lbs)',
data: [], // Will be populated dynamically
borderColor: 'rgba(54, 162, 235, 1)',
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fill: false,
borderWidth: 2
}]
};
var chartOptions = {
responsive: true,
maintainAspectRatio: false,
scales: {
y: {
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title: {
display: true,
text: 'Weight (lbs)'
}
},
x: {
title: {
display: true,
text: 'Height (inches)'
}
}
},
plugins: {
title: {
display: true,
text: 'Army Weight Standards by Height'
}
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};
function createOrUpdateChart() {
if (htWeightChart) {
htWeightChart.destroy();
}
chartData.labels = [];
chartData.datasets[0].data = [];
chartData.datasets[1].data = [];
// Populate with sample data for visualization – a broader range
var sampleHeights = [60, 62, 64, 66, 68, 70, 72, 74, 76, 78]; // 5'0″ to 6'6″
var maleMaxWeights = [135, 142, 149, 156, 163, 170, 177, 184, 191, 198]; // Approximate for males, varies by age
var femaleMaxWeights = [115, 122, 129, 136, 143, 150, 157, 164, 171, 178]; // Approximate for females, varies by age
var gender = document.getElementById("soldierGender").value;
for (var i = 0; i = 60 && currentHeight <= 78) {
var currentMin = chartData.datasets[0].data[sampleHeights.indexOf(currentHeight)];
var currentMax = chartData.datasets[1].data[sampleHeights.indexOf(currentHeight)];
if (currentMin === undefined || currentMax === undefined) {
// If height is not exactly on sample, try to interpolate or add as a single point
chartData.labels.push(currentHeight + '" (You)');
chartData.datasets[0].data.push(currentMin !== undefined ? currentMin : currentHeight * 0.8); // Placeholder min
chartData.datasets[1].data.push(currentMax !== undefined ? currentMax : currentHeight * 1.2); // Placeholder max
} else {
// Add user's specific data point
chartData.labels.push(currentHeight + '" (You)');
chartData.datasets[0].data.push(currentMin);
chartData.datasets[1].data.push(currentMax);
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htWeightChart = new Chart(ctx, {
type: 'line',
data: chartData,
options: chartOptions
});
}
// Call initially to set up chart structure
createOrUpdateChart();
function isValidNumber(value, min, max, fieldName) {
var errorElement = document.getElementById(fieldName + "Error");
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errorElement.style.display = 'block';
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return true;
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function calculateArmyHtWeight() {
var heightInput = document.getElementById("soldierHeight");
var weightInput = document.getElementById("soldierWeight");
var genderSelect = document.getElementById("soldierGender");
var ageInput = document.getElementById("soldierAge");
var heightError = document.getElementById("heightError");
var weightError = document.getElementById("weightError");
var ageError = document.getElementById("ageError");
var primaryResultDiv = document.getElementById("primaryResult");
var intermediateResultsDivs = document.querySelectorAll('.intermediate-results div');
var tableBody = document.getElementById("resultsTableBody");
// Clear previous errors and results
heightError.style.display = 'none';
weightError.style.display = 'none';
ageError.style.display = 'none';
primaryResultDiv.textContent = '–';
intermediateResultsDivs.forEach(function(div) {
div.querySelector('span').textContent = '–';
});
tableBody.innerHTML = ";
var height = parseFloat(heightInput.value);
var weight = parseFloat(weightInput.value);
var gender = genderSelect.value;
var age = parseInt(ageInput.value);
var heightValid = isValidNumber(heightInput.value, 48, 96, "Soldier Height"); // Approx 4ft to 8ft
var weightValid = isValidNumber(weightInput.value, 80, 350, "Soldier Weight"); // Reasonable min/max
var ageValid = isValidNumber(ageInput.value, 17, 65, "Soldier Age"); // Typical military age range
if (!heightValid || !weightValid || !ageValid) {
return; // Stop calculation if inputs are invalid
}
// Define Army Standards (simplified for calculation – actual AR 600-9 is detailed)
// These are generalized ranges and might not perfectly match every specific age bracket in AR 600-9.
// For precise calculations, one would need to map height to specific age brackets.
var standards = {
male: {
ageGroups: [
{ maxAge: 20, minH: 60, maxH: 71, minW: 120, maxW: 175, bfLimit: 20 },
{ maxAge: 23, minH: 60, maxH: 71, minW: 126, maxW: 185, bfLimit: 20 },
{ maxAge: 32, minH: 60, maxH: 71, minW: 132, maxW: 195, bfLimit: 21 },
{ maxAge: 42, minH: 60, maxH: 71, minW: 138, maxW: 205, bfLimit: 22 },
{ maxAge: 54, minH: 60, maxH: 71, minW: 144, maxW: 215, bfLimit: 23 },
{ maxAge: 65, minH: 60, maxH: 71, minW: 150, maxW: 225, bfLimit: 24 }
],
// Min/Max for shorter/taller heights need more complex interpolation or lookup tables
// This is a simplified example. Real AR 600-9 has tables for various heights.
// Example for 72 inches and above, adjust weights upwards.
// Example for below 60 inches, adjust weights downwards.
},
female: {
ageGroups: [
{ maxAge: 20, minH: 60, maxH: 71, minW: 105, maxW: 145, bfLimit: 30 },
{ maxAge: 23, minH: 60, maxH: 71, minW: 110, maxW: 155, bfLimit: 30 },
{ maxAge: 32, minH: 60, maxH: 71, minW: 115, maxW: 165, bfLimit: 32 },
{ maxAge: 42, minH: 60, maxH: 71, minW: 120, maxW: 175, bfLimit: 34 },
{ maxAge: 54, minH: 60, maxH: 71, minW: 125, maxW: 185, bfLimit: 36 },
{ maxAge: 65, minH: 60, maxH: 71, minW: 130, maxW: 195, bfLimit: 38 }
]
}
};
var selectedStandards = standards[gender] ? standards[gender].ageGroups : null;
var relevantStandard = null;
if (selectedStandards) {
for (var i = 0; i < selectedStandards.length; i++) {
if (age <= selectedStandards[i].maxAge) {
relevantStandard = selectedStandards[i];
break;
}
}
}
var minWeight = '–';
var maxWeight = '–';
var bfLimit = '–';
var status = 'Undetermined';
if (relevantStandard) {
// Basic interpolation for height. Real tables are more granular.
var effectiveMaxW = relevantStandard.maxW;
var effectiveMinW = relevantStandard.minW;
var bfLimit = relevantStandard.bfLimit;
// Adjust for height – this is a VERY simplified linear interpolation.
// AR 600-9 uses specific tables for different height bands.
// Example: If height is outside the 60-71 inch range, adjust.
if (height 71) { // Above standard range
effectiveMaxW = relevantStandard.maxW * (height / 71) * 1.05; // Increase weight allowance
effectiveMinW = relevantStandard.minW * (height / 71) * 1.05;
}
minWeight = Math.round(effectiveMinW);
maxWeight = Math.round(effectiveMaxW);
bfLimit = relevantStandard.bfLimit;
if (weight maxWeight) {
status = 'Above Maximum Weight';
primaryResultDiv.style.color = 'red';
} else {
status = 'Within Standards';
primaryResultDiv.style.color = 'green';
}
} else {
status = 'Standards Not Found';
primaryResultDiv.style.color = 'grey';
}
primaryResultDiv.textContent = status;
intermediateResultsDivs[0].querySelector('span').textContent = isNaN(minWeight) ? '–' : minWeight;
intermediateResultsDivs[1].querySelector('span').textContent = isNaN(maxWeight) ? '–' : maxWeight;
intermediateResultsDivs[2].querySelector('span').textContent = isNaN(bfLimit) ? '–' : bfLimit + '%';
// Populate table with example data
populateExampleTable(gender, height);
// Update chart
createOrUpdateChart();
}
function populateExampleTable(gender, currentHeight) {
var tableBody = document.getElementById("resultsTableBody");
tableBody.innerHTML = "; // Clear existing rows
var heightsToDisplay = [60, 64, 68, 72, 76]; // Example heights (5'0″, 5'4″, 5'8″, 6'0″, 6'4″)
var sampleAges = [18, 25, 35, 45, 55]; // Sample ages to show variation
heightsToDisplay.forEach(function(h) {
sampleAges.forEach(function(age) {
var standards = getArmyStandards(gender, age, h);
if (standards) {
var row = tableBody.insertRow();
row.insertCell(0).textContent = h + '" (' + Math.floor(h / 12) + "'" + (h % 12) + '")';
row.insertCell(1).textContent = gender.charAt(0).toUpperCase() + gender.slice(1);
row.insertCell(2).textContent = standards.minWeight + ' lbs';
row.insertCell(3).textContent = standards.maxWeight + ' lbs';
row.insertCell(4).textContent = standards.bfLimit + '%';
}
});
});
}
function getArmyStandards(gender, age, height) {
var standardsData = {
male: [
{ maxAge: 20, minH: 60, maxH: 71, minW: 120, maxW: 175, bfLimit: 20 },
{ maxAge: 23, minH: 60, maxH: 71, minW: 126, maxW: 185, bfLimit: 20 },
{ maxAge: 32, minH: 60, maxH: 71, minW: 132, maxW: 195, bfLimit: 21 },
{ maxAge: 42, minH: 60, maxH: 71, minW: 138, maxW: 205, bfLimit: 22 },
{ maxAge: 54, minH: 60, maxH: 71, minW: 144, maxW: 215, bfLimit: 23 },
{ maxAge: 65, minH: 60, maxH: 71, minW: 150, maxW: 225, bfLimit: 24 }
],
female: [
{ maxAge: 20, minH: 60, maxH: 71, minW: 105, maxW: 145, bfLimit: 30 },
{ maxAge: 23, minH: 60, maxH: 71, minW: 110, maxW: 155, bfLimit: 30 },
{ maxAge: 32, minH: 60, maxH: 71, minW: 115, maxW: 165, bfLimit: 32 },
{ maxAge: 42, minH: 60, maxH: 71, minW: 120, maxW: 175, bfLimit: 34 },
{ maxAge: 54, minH: 60, maxH: 71, minW: 125, maxW: 185, bfLimit: 36 },
{ maxAge: 65, minH: 60, maxH: 71, minW: 130, maxW: 195, bfLimit: 38 }
]
};
var relevantGroup = null;
if (standardsData[gender]) {
for (var i = 0; i < standardsData[gender].length; i++) {
if (age <= standardsData[gender][i].maxAge) {
relevantGroup = standardsData[gender][i];
break;
}
}
}
if (!relevantGroup) return null;
var effectiveMaxW = relevantGroup.maxW;
var effectiveMinW = relevantGroup.minW;
var bfLimit = relevantGroup.bfLimit;
// Simplified height adjustment (linear interpolation, actual tables are discrete)
if (height relevantGroup.maxH) {
effectiveMaxW = relevantGroup.maxW * (height / relevantGroup.maxH) * 1.05;
effectiveMinW = relevantGroup.minW * (height / relevantGroup.maxH) * 1.05;
} else { // Height is within the table's range, try to find exact or interpolate if needed
// This part requires actual table data or a more complex function.
// For simplicity, we'll use the base min/max if height is within the reference range (60-71)
// A real implementation would look up specific height bands.
effectiveMaxW = relevantGroup.maxW;
effectiveMinW = relevantGroup.minW;
}
// Ensure min is always less than max
if (effectiveMinW > effectiveMaxW) {
var temp = effectiveMinW;
effectiveMinW = effectiveMaxW;
effectiveMaxW = temp;
}
return {
minWeight: Math.round(effectiveMinW),
maxWeight: Math.round(effectiveMaxW),
bfLimit: bfLimit
};
}
function resetCalculator() {
document.getElementById("soldierHeight").value = "";
document.getElementById("soldierWeight").value = "";
document.getElementById("soldierGender").value = "male";
document.getElementById("soldierAge").value = "";
document.getElementById("heightError").style.display = 'none';
document.getElementById("weightError").style.display = 'none';
document.getElementById("ageError").style.display = 'none';
document.getElementById("primaryResult").textContent = '–';
var intermediateResultsDivs = document.querySelectorAll('.intermediate-results div');
intermediateResultsDivs.forEach(function(div) {
div.querySelector('span').textContent = '–';
});
document.getElementById("resultsTableBody").innerHTML = ";
// Reset chart data if needed, or just update with default empty state
chartData.labels = [];
chartData.datasets[0].data = [];
chartData.datasets[1].data = [];
if (htWeightChart) {
htWeightChart.destroy();
}
createOrUpdateChart(); // Recreate chart with empty data
}
function copyResults() {
var height = document.getElementById("soldierHeight").value;
var weight = document.getElementById("soldierWeight").value;
var gender = document.getElementById("soldierGender").value;
var age = document.getElementById("soldierAge").value;
var primaryResult = document.getElementById("primaryResult").textContent;
var intermediateResults = document.querySelectorAll('.intermediate-results span');
var minWeight = intermediateResults[0].textContent;
var maxWeight = intermediateResults[1].textContent;
var bfLimit = intermediateResults[2].textContent;
var resultText = "Army Height and Weight Calculator Results:\n";
resultText += "—————————————-\n";
resultText += "Inputs:\n";
resultText += " Height: " + height + " inches\n";
resultText += " Weight: " + weight + " lbs\n";
resultText += " Gender: " + gender.charAt(0).toUpperCase() + gender.slice(1) + "\n";
resultText += " Age: " + age + " years\n";
resultText += "\n";
resultText += "Outputs:\n";
resultText += " Status: " + primaryResult + "\n";
resultText += " Min Weight: " + minWeight + "\n";
resultText += " Max Weight: " + maxWeight + "\n";
resultText += " Body Fat Limit: " + bfLimit + "\n";
// Use a temporary textarea to copy text to clipboard
var textArea = document.createElement("textarea");
textArea.value = resultText;
textArea.style.position = "fixed"; // Avoid scrolling to bottom
textArea.style.opacity = "0";
document.body.appendChild(textArea);
textArea.focus();
textArea.select();
try {
var successful = document.execCommand('copy');
var msg = successful ? 'Results copied!' : 'Copy failed!';
// Optionally display a temporary message to the user
console.log(msg);
} catch (err) {
console.error('Fallback: Oops, unable to copy', err);
}
document.body.removeChild(textArea);
}
function toggleFaq(element) {
var parent = element.parentElement;
parent.classList.toggle('open');
var answer = parent.querySelector('.faq-item-answer');
if (parent.classList.contains('open')) {
answer.style.display = 'block';
} else {
answer.style.display = 'none';
}
}
// Initial calculation and chart update on page load
window.onload = function() {
calculateArmyHtWeight();
};