Backpacking Gear Weight Calculator Comparison

Backpacking Gear Weight Calculator Comparison | Your Trusted Tool :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –border-color: #ccc; –light-gray: #e9ecef; –white: #fff; –error-color: #dc3545; } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–background-color); color: var(–text-color); line-height: 1.6; margin: 0; padding: 0; display: flex; flex-direction: column; align-items: center; padding-top: 20px; padding-bottom: 40px; } .container { width: 100%; max-width: 1000px; margin: 0 auto; padding: 20px; background-color: var(–white); border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); text-align: center; } h1, h2, h3 { color: var(–primary-color); margin-bottom: 15px; } h1 { font-size: 2.2em; } h2 { font-size: 1.8em; margin-top: 30px; } h3 { font-size: 1.4em; margin-top: 25px; } .loan-calc-container { background-color: var(–white); padding: 30px; border-radius: 8px; box-shadow: 0 1px 5px rgba(0, 0, 0, 0.08); margin-top: 20px; margin-bottom: 30px; text-align: left; display: flex; flex-direction: column; gap: 20px; } .input-group { margin-bottom: 15px; width: 100%; } .input-group label { display: block; margin-bottom: 8px; font-weight: bold; color: var(–primary-color); } .input-group input[type="number"], .input-group input[type="text"], .input-group select { width: calc(100% – 20px); /* Adjust for padding */ padding: 10px; border: 1px solid var(–border-color); border-radius: 4px; box-sizing: border-box; /* Include padding and border in the element's total width and height */ font-size: 1em; } .input-group input[type="number"]:focus, .input-group input[type="text"]:focus, .input-group select:focus { outline: none; border-color: var(–primary-color); box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.2); } .input-group .helper-text { font-size: 0.85em; color: #6c757d; margin-top: 5px; display: block; } .input-group .error-message { color: var(–error-color); font-size: 0.85em; margin-top: 5px; display: none; /* Hidden by default */ } .input-group .error-message.visible { display: block; /* Shown when there's an error */ } .button-group { display: flex; justify-content: flex-start; gap: 15px; margin-top: 20px; } .btn { padding: 10px 20px; border: none; border-radius: 4px; cursor: pointer; font-size: 1em; font-weight: bold; transition: background-color 0.2s ease; display: inline-block; } .btn-primary { background-color: var(–primary-color); color: var(–white); } .btn-primary:hover { background-color: #003366; } .btn-secondary { background-color: var(–light-gray); color: var(–text-color); border: 1px solid var(–border-color); } .btn-secondary:hover { background-color: #d3d9df; } .btn-copy { background-color: #6c757d; color: var(–white); } .btn-copy:hover { background-color: #5a6268; } #result-container { margin-top: 30px; padding: 25px; background-color: var(–primary-color); color: var(–white); border-radius: 8px; text-align: center; box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.1); } #result-container h3 { color: var(–white); margin-bottom: 15px; } .main-result { font-size: 2.5em; font-weight: bold; margin-bottom: 10px; } .result-label { font-size: 1.1em; color: rgba(255, 255, 255, 0.8); margin-bottom: 15px; } .intermediate-results { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 20px; margin-top: 20px; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, 0.3); } .intermediate-value { text-align: center; flex: 1; min-width: 150px; } .intermediate-value .value { font-size: 1.8em; font-weight: bold; display: block; } .intermediate-value .label { font-size: 0.95em; display: block; color: rgba(255, 255, 255, 0.8); } #formula-explanation { margin-top: 20px; padding: 15px; background-color: var(–light-gray); border-radius: 4px; font-size: 0.95em; color: #555; text-align: left; } #formula-explanation strong { color: var(–primary-color); } table { width: 100%; border-collapse: collapse; margin-top: 25px; margin-bottom: 25px; box-shadow: 0 1px 5px rgba(0, 0, 0, 0.08); } th, td { padding: 12px 15px; border: 1px solid var(–border-color); text-align: right; } th { background-color: var(–primary-color); color: var(–white); font-weight: bold; text-align: center; } td { background-color: var(–white); } thead th { background-color: var(–light-gray); color: var(–text-color); } caption { caption-side: top; font-weight: bold; font-size: 1.1em; color: var(–primary-color); margin-bottom: 10px; text-align: left; } canvas { max-width: 100%; height: auto; margin-top: 20px; border: 1px solid var(–border-color); border-radius: 4px; } .chart-container { margin-top: 25px; margin-bottom: 25px; background-color: var(–white); padding: 20px; border-radius: 8px; box-shadow: 0 1px 5px rgba(0, 0, 0, 0.08); } .chart-caption { font-size: 0.95em; color: #6c757d; margin-top: 5px; display: block; text-align: center; } .article-section { margin-top: 40px; background-color: var(–white); padding: 30px; border-radius: 8px; box-shadow: 0 1px 5px rgba(0, 0, 0, 0.08); text-align: left; } .article-section h2, .article-section h3 { text-align: center; } .article-section p, .article-section ul, .article-section ol { margin-bottom: 15px; } .article-section ul, .article-section ol { padding-left: 20px; } .article-section li { margin-bottom: 8px; } .faq-list { list-style: none; padding-left: 0; } .faq-list li { border: 1px solid var(–border-color); border-radius: 4px; margin-bottom: 15px; } .faq-list li strong { display: block; padding: 10px 15px; background-color: var(–primary-color); color: var(–white); cursor: pointer; position: relative; } .faq-list li strong::after { content: '+'; position: absolute; right: 15px; font-size: 1.2em; } .faq-list li.active strong::after { content: '-'; } .faq-list li div { padding: 10px 15px; display: none; background-color: var(–light-gray); } .faq-list li.active div { display: block; } .internal-links { margin-top: 30px; background-color: var(–white); padding: 25px; border-radius: 8px; box-shadow: 0 1px 5px rgba(0, 0, 0, 0.08); } .internal-links h3 { text-align: center; margin-bottom: 20px; } .internal-links ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 15px; } .internal-links li { margin-bottom: 0; } .internal-links a { color: var(–primary-color); text-decoration: none; font-weight: bold; border-bottom: 2px solid var(–primary-color); padding-bottom: 3px; transition: color 0.2s ease, border-color 0.2s ease; } .internal-links a:hover { color: #003366; border-bottom-color: #003366; } .internal-links p { font-size: 0.9em; color: #555; margin-top: 5px; } footer { margin-top: 40px; font-size: 0.85em; color: #777; text-align: center; width: 100%; } .tooltip { position: relative; display: inline-block; cursor: pointer; border-bottom: 1px dotted #6c757d; } .tooltip .tooltiptext { visibility: hidden; width: 220px; background-color: #555; color: #fff; text-align: center; border-radius: 6px; padding: 5px 10px; position: absolute; z-index: 1; bottom: 125%; left: 50%; margin-left: -110px; opacity: 0; transition: opacity 0.3s; font-size: 0.8em; line-height: 1.3; } .tooltip .tooltiptext::after { content: ""; position: absolute; top: 100%; left: 50%; margin-left: -5px; border-width: 5px; border-style: solid; border-color: #555 transparent transparent transparent; } .tooltip:hover .tooltiptext { visibility: visible; opacity: 1; }

Backpacking Gear Weight Calculator Comparison

Backpacking Gear Weight Calculator

Enter the weight of your key backpacking gear items to compare and optimize your total pack weight. All weights should be in kilograms (kg).

The empty weight of your backpack.
Including poles, stakes, and footprint.
Consider temperature rating and fill material.
Inflatable, foam, etc.
Weight of stove, fuel canister, lighter.
Pot, spoon, mug, etc.
Filter, purification tablets, bag.
Layering system, rain gear, spare socks.
Weight of food for the duration of the trip.
Headlamp, first-aid kit, navigation tools, toiletries, etc.
Total planned hiking distance.

Your Backpacking Gear Weight Analysis

0.00
Total Packed Weight (kg)
0.00 Base Weight (Excluding Food/Water)
0.00 Weight Per Kilometer (kg/km)
0.00 % of Body Weight
Formula Explanation:

Total Packed Weight: This is the sum of all your gear, food, and water. It's the absolute weight you'll be carrying. We include the backpack itself, shelter, sleeping system, cooking gear, clothing, consumables (food/water), and miscellaneous items.

Base Weight (Excluding Food/Water): This is the weight of your gear that you carry regardless of the trip duration, excluding consumables like food and water. Aiming for a lower base weight is crucial for comfort and performance.

Weight Per Kilometer: This metric helps understand the load impact over distance. It's calculated by dividing the Total Packed Weight by the planned distance.

% of Body Weight: This is calculated by comparing your Total Packed Weight to a user-inputted body weight. A common guideline is to keep total pack weight under 20% of your body weight for comfort.

Distribution of Gear Weights
Detailed Gear Weight Breakdown
Gear Category Weight (kg) % of Total Weight

What is a Backpacking Gear Weight Calculator Comparison?

A backpacking gear weight calculator comparison is a vital tool for hikers, backpackers, and outdoor enthusiasts looking to meticulously manage and optimize the weight of their equipment. At its core, it allows users to input the individual weights of various components of their hiking kit – from the backpack itself to clothing, shelter, and consumables. By summing these weights, the calculator provides a comprehensive view of the total load. Beyond just a simple sum, advanced calculators offer comparative metrics such as base weight (excluding food and water), weight per mile (or kilometer), and the percentage of body weight carried. This detailed breakdown empowers backpackers to make informed decisions about their gear, helping them to reduce their overall pack weight for greater comfort, increased efficiency, and a more enjoyable outdoor experience. It's an essential step in responsible trip planning and gear selection.

Who Should Use It?

This backpacking gear weight calculator comparison is indispensable for:

  • Thru-hikers and Long-Distance Backpackers: For whom every ounce matters over hundreds or thousands of miles.
  • Section Hikers: Planning multi-day trips where carrying efficiency is key.
  • Day Hikers (with heavy loads): Especially those carrying extra gear for photography, specific activities, or emergencies.
  • Ultralight Backpacking Enthusiasts: Who are constantly seeking to shave grams off their setup.
  • Beginner Backpackers: To understand the impact of different gear choices and avoid overpacking.
  • Anyone Planning a Multi-Day Trek: To ensure their pack is manageable and comfortable for the planned terrain and duration.

Common Misconceptions

  • "Lightweight gear is always expensive." While some ultralight gear can be pricey, strategic choices and even DIY solutions can achieve weight savings without breaking the bank. The calculator helps prioritize which items offer the most significant weight-to-cost ratio.
  • "Only hardcore ultralight hikers need to worry about weight." Every backpacker benefits from a lighter load. Even reducing pack weight by a few pounds can make a significant difference in comfort and reduce the risk of injury on any trip.
  • "Total weight is all that matters." While total weight is important, understanding 'base weight' is critical. Reducing base weight means carrying less regardless of trip length, which is a more sustainable approach to weight management than just packing less food for shorter trips.

Backpacking Gear Weight Calculation and Mathematical Explanation

The process of calculating backpacking gear weight involves straightforward addition, but the derived metrics provide deeper insights. Our calculator employs several key formulas to offer a comprehensive analysis:

Core Formulas:

  1. Total Packed Weight (TPW): This is the most fundamental calculation, summing all the weights of the gear items, food, and water.

    TPW = Backpack + Shelter + Sleeping Bag + Sleeping Pad + Stove & Fuel + Cookware + Water Filter + Clothing + Food + Miscellaneous

  2. Base Weight (BW): This represents the weight of everything you carry except for consumables like food and water. It's a critical metric for long-term gear optimization.

    BW = Backpack + Shelter + Sleeping Bag + Sleeping Pad + Stove & Fuel + Cookware + Water Filter + Clothing + Miscellaneous

    Note: For simplicity in this calculator, we sum all user-inputted items first, then subtract 'Food Weight' if it was included as a separate item.

  3. Weight Per Kilometer (WPK): This metric helps contextualize your pack weight relative to the distance you intend to cover.

    WPK = TPW / Distance (in km)

  4. Percentage of Body Weight (%BW): This is a crucial indicator for comfort and injury prevention, especially on longer treks.

    %BW = (TPW / Body Weight) * 100

Variable Explanations and Typical Ranges:

Backpacking Gear Weight Variables
Variable Meaning Unit Typical Range
Backpack Base Weight The empty weight of the backpack itself. kg 0.8 – 2.5 kg (Ultralight to standard)
Shelter Weight Weight of tent, tarp, or hammock system. kg 0.5 – 2.0 kg (Single person ultralight to 2-person standard)
Sleeping Bag Weight Weight of the sleeping bag or quilt. Varies significantly by temperature rating and fill. kg 0.5 – 1.5 kg (Down ultralight to synthetic)
Sleeping Pad Weight Weight of the sleeping pad. kg 0.15 – 0.7 kg (Minimalist foam to insulated inflatable)
Stove & Fuel Weight Weight of the cooking stove and fuel canister. kg 0.1 – 0.5 kg (Canister stove + fuel)
Cookware & Utensils Pot, mug, spoon, etc. kg 0.1 – 0.4 kg
Water Filter/Purifier Weight of the chosen water treatment method. kg 0.05 – 0.3 kg (Tablets to pump filters)
Clothing Weight of packed clothing layers, including rain gear. Assumes wearing some clothing. kg 0.7 – 2.0 kg
Food Weight Weight of food carried for the trip. Highly variable by duration and diet. kg/day 0.6 – 1.2 kg per person per day
Miscellaneous Headlamp, toiletries, first-aid, repair kit, navigation tools, etc. kg 0.3 – 1.5 kg
Distance to Travel Total planned hiking distance. km 10 – 500+ km
Body Weight The user's personal body weight. kg 40 – 120+ kg

Practical Examples (Real-World Use Cases)

Example 1: Weekend Warrior – Seeking Lighter Load

Sarah is planning a 2-night, 3-day backpacking trip in the mountains. She's been feeling the strain on her previous trips and wants to see if she can lighten her load. Her body weight is 65 kg.

Inputs:

  • Backpack Base Weight: 2.2 kg
  • Tent/Shelter Weight: 1.8 kg
  • Sleeping Bag Weight: 1.2 kg
  • Sleeping Pad Weight: 0.6 kg
  • Stove & Fuel Weight: 0.4 kg
  • Cookware & Utensils Weight: 0.3 kg
  • Water Filter/Purifier Weight: 0.2 kg
  • Clothing Weight: 1.5 kg
  • Food Weight: 2.0 kg (for 3 days)
  • Miscellaneous Weight: 1.0 kg
  • Distance to Travel: 45.0 km
  • Body Weight: 65 kg

Calculated Results:

  • Total Packed Weight: 11.20 kg
  • Base Weight (Excluding Food/Water): 9.20 kg
  • Weight Per Kilometer: 0.25 kg/km
  • % of Body Weight: 17.23%

Interpretation: Sarah's total pack weight is 11.2 kg. Her base weight is 9.2 kg. At 17.23% of her body weight, it's within the generally recommended threshold (<20%), but she notices her Base Weight is quite high. The calculator might prompt her to investigate items like her backpack, tent, or sleeping bag for potential lighter alternatives, as these contribute significantly to the base weight she carries on every trip.

Example 2: Ultralight Aspirant – Maximizing Efficiency

Mark is training for a long-distance thru-hike and is obsessed with minimizing his pack weight. He aims for a pack weight under 10% of his body weight (which is 70 kg).

Inputs:

  • Backpack Base Weight: 1.0 kg
  • Tent/Shelter Weight: 0.8 kg
  • Sleeping Bag Weight: 0.7 kg
  • Sleeping Pad Weight: 0.3 kg
  • Stove & Fuel Weight: 0.2 kg
  • Cookware & Utensils Weight: 0.15 kg
  • Water Filter/Purifier Weight: 0.1 kg
  • Clothing Weight: 1.0 kg
  • Food Weight: 1.2 kg (per day, for a 5-day trip = 6.0 kg)
  • Miscellaneous Weight: 0.5 kg
  • Distance to Travel: 100.0 km
  • Body Weight: 70 kg

Calculated Results:

  • Total Packed Weight: 11.95 kg
  • Base Weight (Excluding Food/Water): 5.95 kg
  • Weight Per Kilometer: 0.12 kg/km
  • % of Body Weight: 17.07%

Interpretation: Mark has achieved an impressive 5.95 kg Base Weight. However, his Total Packed Weight (including food for 5 days) is 11.95 kg, which is about 17.07% of his body weight. This highlights that even with ultralight gear, consumables can significantly increase the overall load. The calculator shows his Weight Per Kilometer is very efficient (0.12 kg/km), but if his goal is under 10% body weight for the *total* pack, he'd need to reduce food quantity or length of carry, or further reduce his base weight, which becomes increasingly challenging and expensive.

How to Use This Backpacking Gear Weight Calculator

Using our backpacking gear weight calculator comparison is simple and provides immediate insights. Follow these steps:

Step-by-Step Instructions:

  1. Gather Your Gear Weights: Before using the calculator, weigh each of your essential backpacking items individually. Use a reliable scale (kitchen scale or luggage scale) and measure in kilograms (kg).
  2. Input Item Weights: Enter the weight for each category into the corresponding input field. Be as accurate as possible. For items like "Stove & Fuel" or "Miscellaneous," group related items together to save time.
  3. Enter Trip Specifics: Input the planned distance of your hike in kilometers (km). If you want to calculate the percentage of your body weight, enter your body weight in kilograms (kg) into the relevant field.
  4. Calculate: Click the "Calculate Weight" button. The results will appear instantly below the calculator.
  5. Review Results: Examine the primary result (Total Packed Weight) and the intermediate values (Base Weight, Weight Per Kilometer, % of Body Weight). The chart and table will visually break down the weight distribution.
  6. Analyze and Optimize: Compare your results to common recommendations (e.g., Base Weight under 5-8 kg for ultralight, Total Weight under 20% of body weight). Identify which gear items contribute the most to your total weight.
  7. Use the Copy Button: If you want to save your results or share them, use the "Copy Results" button. This will copy all key figures and assumptions to your clipboard.
  8. Reset for New Calculations: Use the "Reset" button to clear all fields and start over with different gear configurations or trip plans.

How to Read Results:

  • Total Packed Weight (kg): The most critical number – the absolute weight you'll carry. Aim to reduce this as much as possible for comfort.
  • Base Weight (kg): Your core gear weight. This is what you optimize when trying to go ultralight. Lower is better for carrying less on every trip.
  • Weight Per Kilometer (kg/km): Indicates how heavy your pack feels over distance. A lower number means less impact per mile.
  • % of Body Weight: A crucial metric for comfort and injury prevention. Many aim for under 20%, some even under 15% or 10% for challenging trips.
  • Gear Weight Breakdown (Table & Chart): Shows which categories are heaviest. This is where you'll find opportunities to cut weight.

Decision-Making Guidance:

Use the calculator results to guide your gear choices:

  • High Total Weight? Look for opportunities to replace heavy items (tent, sleeping bag, backpack) with lighter alternatives. Consider if you truly need every item in the 'Miscellaneous' category.
  • High Base Weight? Focus on shaving grams off your core gear. Can you switch to a lighter backpack, a smaller tent, or a more compact sleeping bag?
  • High % of Body Weight? This is a strong indicator that your total load is too much for your physique, especially for extended trips. Prioritize weight reduction across all categories.
  • High Weight Per Kilometer? While related to total weight, this emphasizes the impact over distance. Lighter packs make climbs easier and reduce fatigue on long treks.

Key Factors That Affect Backpacking Gear Weight Results

Several factors influence the weight of your backpacking gear and, consequently, the results of the calculator. Understanding these can help you make more strategic decisions:

  1. Gear Material and Design:

    This is perhaps the most significant factor. Ultralight tents made from Dyneema Composite Fabric (DCF) or high-tenacity nylon are dramatically lighter than traditional polyester tents. Down insulation in sleeping bags offers superior warmth-to-weight ratio compared to synthetic fills. Similarly, aluminum or titanium cookware is lighter than stainless steel. The calculator helps you quantify the impact of choosing lighter materials.

  2. Trip Duration and Distance:

    Longer trips necessitate carrying more food and potentially more fuel, significantly increasing your Total Packed Weight. The 'Distance to Travel' input directly impacts the 'Weight Per Kilometer' metric, showing how a heavy pack feels over extended mileage.

  3. Environmental Conditions (Temperature, Weather):

    Colder temperatures require heavier sleeping bags, more layers of clothing (including insulated jackets and pants), and potentially a more robust shelter, all adding to your Base Weight. Wet weather necessitates carrying reliable rain gear. These elements directly influence the 'Clothing Weight' and 'Sleeping Bag Weight' inputs.

  4. Personal Comfort Preferences and Needs:

    Some backpackers prioritize comfort and are willing to carry a bit more weight for features like a more supportive backpack, a thicker sleeping pad, or camp luxuries. Others are willing to sacrifice some comfort for a lighter load. The calculator allows you to experiment with different comfort levels by adjusting weights.

  5. Food and Water Carry Strategy:

    How much food you carry per day and your water sources dramatically affect total weight. Carrying enough food for a week is much heavier than resupplying frequently. Similarly, relying on readily available water sources reduces the need to carry large quantities, but requires a reliable water filter or purification method, which also has weight.

  6. Resale Value and Durability:

    High-quality, lightweight gear often comes with a higher upfront cost but can also be more durable and retain a higher resale value. Conversely, cheaper, heavier gear might need replacement sooner. When evaluating gear choices, consider not just the weight but also the long-term cost of ownership and durability.

  7. Body Weight and Physical Fitness:

    As shown in the '% of Body Weight' calculation, your own physical capacity plays a crucial role. A lighter person will feel the impact of the same pack weight more acutely than a heavier person. Understanding this ratio helps set realistic weight goals based on your individual fitness and the demands of the hike.

Frequently Asked Questions (FAQ)

  • Q1: What is considered a "good" Base Weight for backpacking?
    A: For general backpacking, a Base Weight under 9-10 kg (20-22 lbs) is good. For ultralight backpacking, the goal is typically under 5-7 kg (11-15 lbs). Our calculator helps you track this key metric.
  • Q2: How much of my body weight should my backpack be?
    A: A common guideline is to keep your Total Packed Weight (including food and water) at or below 20% of your body weight. For thru-hikes or strenuous trips, aiming for 15% or less is often recommended for comfort and injury prevention.
  • Q3: Does the 'Miscellaneous' category include electronics?
    A: Yes, electronics like headlamps, power banks, charging cables, and GPS devices should typically be included in the miscellaneous category.
  • Q4: Should I include the weight of the clothes I'm wearing?
    A: Generally, no. The 'Clothing Weight' in the calculator refers to the clothing you pack in your backpack (e.g., extra layers, rain gear, spare socks). The assumption is you'll be wearing some base layers.
  • Q5: How often should I re-calculate my backpacking gear weight?
    A: It's a good practice to recalculate your gear weight whenever you acquire new gear, plan a significantly different type of trip (e.g., winter vs. summer), or if you're consistently feeling your pack is too heavy. Regular review is key to optimization.
  • Q6: What's the difference between Total Packed Weight and Base Weight?
    A: Total Packed Weight is everything you carry, including food and water. Base Weight is the weight of your gear, excluding consumables like food and water. Base Weight is what ultralight hikers focus on optimizing as it's consistent across trips of different lengths.
  • Q7: My Weight Per Kilometer seems high. What can I do?
    A: A high Weight Per Kilometer (kg/km) directly correlates to a high Total Packed Weight. Focus on reducing your overall pack weight by investing in lighter gear, packing only essentials, and optimizing your food and water carry strategy.
  • Q8: Can this calculator help me decide between two different tents?
    A: Absolutely. You can input the weight of Tent A, see your total weight, then reset and input the weight of Tent B. Compare the resulting total weights to see which one makes a more significant difference to your overall load.

© 2023 Your Trusted Backpacking Resource. All rights reserved.

function validateInput(id, min, max, errorId) { var input = document.getElementById(id); var errorElement = document.getElementById(errorId); var value = parseFloat(input.value); errorElement.classList.remove('visible'); // Hide error by default if (isNaN(value)) { errorElement.innerText = "Please enter a valid number."; errorElement.classList.add('visible'); return false; } if (value max) { errorElement.innerText = "Value is unusually high. Please check."; errorElement.classList.add('visible'); return false; } return true; } function calculateWeight() { // Validate all inputs var valid = true; valid = validateInput('backpackWeight', 0, 5, 'backpackWeightError') && valid; valid = validateInput('tentWeight', 0, 5, 'tentWeightError') && valid; valid = validateInput('sleepingBagWeight', 0, 5, 'sleepingBagWeightError') && valid; valid = validateInput('sleepingPadWeight', 0, 5, 'sleepingPadWeightError') && valid; valid = validateInput('stoveFuelWeight', 0, 5, 'stoveFuelWeightError') && valid; valid = validateInput('cookwareWeight', 0, 5, 'cookwareWeightError') && valid; valid = validateInput('waterFilterWeight', 0, 5, 'waterFilterWeightError') && valid; valid = validateInput('clothingWeight', 0, 5, 'clothingWeightError') && valid; valid = validateInput('foodWeight', 0, 10, 'foodWeightError') && valid; // Food can be heavier per trip valid = validateInput('miscellaneousWeight', 0, 5, 'miscellaneousWeightError') && valid; valid = validateInput('distanceTraveled', 0, 1000, 'distanceTraveledError') && valid; // Max distance // Assuming body weight is not directly used in calculation but for % of body weight display // If body weight was an input: // var bodyWeight = parseFloat(document.getElementById('bodyWeight').value); // if (isNaN(bodyWeight) || bodyWeight 300) { // document.getElementById('bodyWeightError').innerText = "Please enter a valid body weight."; // document.getElementById('bodyWeightError').classList.add('visible'); // valid = false; // } if (!valid) { document.getElementById('result-container').style.display = 'none'; return; } var backpackWeight = parseFloat(document.getElementById('backpackWeight').value); var tentWeight = parseFloat(document.getElementById('tentWeight').value); var sleepingBagWeight = parseFloat(document.getElementById('sleepingBagWeight').value); var sleepingPadWeight = parseFloat(document.getElementById('sleepingPadWeight').value); var stoveFuelWeight = parseFloat(document.getElementById('stoveFuelWeight').value); var cookwareWeight = parseFloat(document.getElementById('cookwareWeight').value); var waterFilterWeight = parseFloat(document.getElementById('waterFilterWeight').value); var clothingWeight = parseFloat(document.getElementById('clothingWeight').value); var foodWeight = parseFloat(document.getElementById('foodWeight').value); var miscellaneousWeight = parseFloat(document.getElementById('miscellaneousWeight').value); var distanceTraveled = parseFloat(document.getElementById('distanceTraveled').value); // For % of body weight calculation, let's assume a default body weight if not provided, or prompt user. // For this example, we'll hardcode a common value if the field isn't present. // In a real scenario, you'd likely have a dedicated input for body weight. var bodyWeight = 70; // Default body weight in kg for % calculation // If you had an input for body weight: // var bodyWeightInput = document.getElementById('bodyWeight'); // if (bodyWeightInput) { // bodyWeight = parseFloat(bodyWeightInput.value); // if (isNaN(bodyWeight) || bodyWeight 0) { weightPerKilometer = totalPackWeight / distanceTraveled; } var percentageOfBodyWeight = 0; if (bodyWeight > 0) { percentageOfBodyWeight = (totalPackWeight / bodyWeight) * 100; } document.getElementById('totalPackWeight').innerText = totalPackWeight.toFixed(2); document.getElementById('baseWeightExcludingFoodWater').innerText = baseWeightExcludingFoodWater.toFixed(2); document.getElementById('weightPerMile').innerText = weightPerKilometer.toFixed(2); // Corrected label for kg/km document.getElementById('% of Body Weight').innerText = percentageOfBodyWeight.toFixed(2); // Corrected label for % document.getElementById('result-container').style.display = 'block'; updateChartAndTable(totalPackWeight, { "Backpack": backpackWeight, "Tent/Shelter": tentWeight, "Sleeping Bag": sleepingBagWeight, "Sleeping Pad": sleepingPadWeight, "Stove & Fuel": stoveFuelWeight, "Cookware": cookwareWeight, "Water Filter": waterFilterWeight, "Clothing": clothingWeight, "Food": foodWeight, "Miscellaneous": miscellaneousWeight }, totalPackWeight); // Pass totalPackWeight for percentage calculation } function resetForm() { document.getElementById('backpackWeight').value = '2.00'; document.getElementById('tentWeight').value = '1.50'; document.getElementById('sleepingBagWeight').value = '1.00'; document.getElementById('sleepingPadWeight').value = '0.50'; document.getElementById('stoveFuelWeight').value = '0.75'; document.getElementById('cookwareWeight').value = '0.30'; document.getElementById('waterFilterWeight').value = '0.20'; document.getElementById('clothingWeight').value = '1.50'; document.getElementById('foodWeight').value = '1.00'; document.getElementById('miscellaneousWeight').value = '1.00'; document.getElementById('distanceTraveled').value = '50.0'; // Clear error messages var errorElements = document.querySelectorAll('.error-message'); for (var i = 0; i 0) { labels.push(category + " (" + chartData[category].toFixed(2) + " kg)"); data.push(chartData[category]); colorIndex = (colorIndex + 1) % colors.length; } } weightChart = new Chart(ctx, { type: 'pie', data: { labels: labels, datasets: [{ data: data, backgroundColor: colors, hoverOffset: 4 }] }, options: { responsive: true, maintainAspectRatio: true, plugins: { legend: { position: 'top', }, title: { display: true, text: 'Gear Weight Distribution' } } } }); // Update Table var tableBody = document.getElementById('gearTableBody'); tableBody.innerHTML = "; // Clear existing rows var gearCategories = Object.keys(weights).sort(function(a, b) { return weights[b] – weights[a]; // Sort descending by weight }); for (var i = 0; i 0) { percentage = (weight / totalWeightForChart) * 100; } var row = tableBody.insertRow(); var cell1 = row.insertCell(0); var cell2 = row.insertCell(1); var cell3 = row.insertCell(2); cell1.textContent = category; cell2.textContent = weight.toFixed(2) + " kg"; cell3.textContent = percentage.toFixed(1) + "%"; } } // Initial call to calculate default values when the page loads document.addEventListener('DOMContentLoaded', function() { // Add click listeners for FAQ toggles var faqItems = document.querySelectorAll('.faq-list li strong'); for (var i = 0; i < faqItems.length; i++) { faqItems[i].addEventListener('click', function() { this.parentElement.classList.toggle('active'); }); } calculateWeight(); // Calculate with default values on load }); <!– If Chart.js was allowed, include: –> <!– The requirement specified "Pure SVG () OR Native ", and "NO external chart libraries". –> /* function drawManualChart(ctx, labels, data, colors) { var totalValue = data.reduce(function(acc, val) { return acc + val; }, 0); var startAngle = 0; for (var i = 0; i < data.length; i++) { var sliceAngle = (data[i] / totalValue) * 2 * Math.PI; ctx.beginPath(); ctx.moveTo(ctx.canvas.width / 2, ctx.canvas.height / 2); ctx.arc(ctx.canvas.width / 2, ctx.canvas.height / 2, Math.min(ctx.canvas.width, ctx.canvas.height) / 2, startAngle, startAngle + sliceAngle); ctx.closePath(); ctx.fillStyle = colors[i % colors.length]; ctx.fill(); // Add labels – logic for positioning text is complex startAngle += sliceAngle; } // Add legend logic here too } // Inside updateChartAndTable, replace new Chart(…) with: // drawManualChart(ctx, labels, data, colors); */

Leave a Comment