Table Linen Calculator

Table Linen Calculator: Estimate Your Fabric Needs :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –secondary-text-color: #666; –border-color: #ddd; –card-background: #fff; –shadow: 0 2px 5px rgba(0,0,0,0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–background-color); color: var(–text-color); margin: 0; padding: 0; display: flex; justify-content: center; padding: 20px; } .container { max-width: 960px; width: 100%; background-color: var(–card-background); padding: 30px; border-radius: 8px; box-shadow: var(–shadow); margin-top: 20px; } h1, h2, h3 { color: var(–primary-color); text-align: center; margin-bottom: 20px; } h1 { font-size: 2.2em; } h2 { font-size: 1.8em; border-bottom: 2px solid var(–primary-color); padding-bottom: 10px; margin-top: 40px; } h3 { font-size: 1.4em; margin-top: 30px; } .loan-calc-container { background-color: var(–card-background); padding: 25px; border-radius: 8px; box-shadow: var(–shadow); margin-bottom: 30px; } .input-group { margin-bottom: 20px; text-align: left; } .input-group label { display: block; margin-bottom: 8px; font-weight: bold; color: var(–primary-color); } .input-group input[type="number"], .input-group select { width: calc(100% – 22px); padding: 12px 10px; border: 1px solid var(–border-color); border-radius: 4px; font-size: 1em; box-sizing: border-box; } .input-group .helper-text { font-size: 0.85em; color: var(–secondary-text-color); margin-top: 5px; display: block; } .error-message { color: red; font-size: 0.8em; margin-top: 5px; display: block; min-height: 1.2em; /* Prevents layout shifts */ } .button-group { display: flex; justify-content: space-between; margin-top: 25px; gap: 10px; } .button-group button, .button-group input[type="button"] { padding: 12px 20px; border: none; border-radius: 4px; font-size: 1em; cursor: pointer; transition: background-color 0.3s ease; flex: 1; text-align: center; } .calculate-btn { background-color: var(–primary-color); color: white; font-weight: bold; } .calculate-btn:hover { background-color: #003366; } .reset-btn { background-color: var(–secondary-text-color); color: white; } .reset-btn:hover { background-color: #555; } .copy-btn { background-color: var(–success-color); color: white; } .copy-btn:hover { background-color: #218838; } #results { margin-top: 30px; padding: 20px; border: 1px solid var(–border-color); border-radius: 8px; background-color: #eef5fc; text-align: center; box-shadow: inset 0 1px 3px rgba(0,0,0,0.05); } #results h3 { margin-top: 0; color: var(–primary-color); } .primary-result { font-size: 2.2em; font-weight: bold; color: var(–primary-color); margin: 15px 0; background-color: #d4e4f7; padding: 15px; border-radius: 5px; display: inline-block; } .intermediate-results div { margin-bottom: 10px; font-size: 1.1em; color: var(–secondary-text-color); } .intermediate-results span { font-weight: bold; color: var(–text-color); } .formula-explanation { font-size: 0.9em; color: var(–secondary-text-color); margin-top: 15px; font-style: italic; } table { width: 100%; border-collapse: collapse; margin-top: 30px; margin-bottom: 30px; box-shadow: var(–shadow); } caption { font-size: 1.1em; margin-bottom: 15px; font-weight: bold; color: var(–primary-color); caption-side: top; text-align: left; } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid var(–border-color); } thead th { background-color: #eef5fc; color: var(–primary-color); font-weight: bold; } tbody tr:nth-child(even) { background-color: #f9f9f9; } canvas { display: block; margin: 30px auto; max-width: 100%; border: 1px solid var(–border-color); border-radius: 4px; background-color: var(–card-background); } .chart-caption { font-size: 0.9em; color: var(–secondary-text-color); text-align: center; margin-top: 10px; display: block; } .article-content { margin-top: 40px; line-height: 1.7; color: var(–text-color); text-align: left; /* Reset alignment for article content */ padding-top: 20px; border-top: 1px solid var(–border-color); } .article-content p { margin-bottom: 1.2em; } .article-content ul, .article-content ol { margin-left: 20px; margin-bottom: 1.2em; } .article-content li { margin-bottom: 0.5em; } .article-content a { color: var(–primary-color); text-decoration: none; } .article-content a:hover { text-decoration: underline; } #internal-links a { color: var(–primary-color); text-decoration: none; display: block; margin-bottom: 8px; } #internal-links a:hover { text-decoration: underline; } #internal-links span { font-size: 0.85em; color: var(–secondary-text-color); display: block; margin-top: 3px; }

Table Linen Calculator

Effortlessly determine the right amount of fabric for your tablecloths, runners, and napkins.

Fabric Needs Calculator

Enter the length of your table in centimeters.
Enter the width of your table in centimeters.
How far down should the linen hang? (e.g., 25 cm for standard, 40 cm for formal).
Enter the side length for square napkins (e.g., 45 cm). Leave blank if not making napkins.
How many napkins do you need?
Enter the width of your fabric roll (e.g., 150 cm, 280 cm).
Amount to add for hems/seams on each edge (e.g., 2 cm).

Your Fabric Calculation Results

0 m²
Tablecloth Area: 0 m²
Total Napkin Area: 0 m²
Total Fabric Needed: 0 m²
Total Fabric Needed: 0 yards

Calculations include desired drop length and seam allowances for a seamless finish. Napkin area is calculated based on individual napkin size and quantity. Total fabric accounts for efficient layout.

Key Assumptions:

  • Fabric roll width: cm
  • Seam allowance per edge: cm
  • Standard fabric efficiency is assumed.

Please enter your table dimensions and fabric details to begin.

Fabric Usage Breakdown
Item Dimensions (cm) Area per Item (m²) Total Area (m²)
Tablecloth N/A N/A N/A
Napkins N/A N/A N/A
Total Estimated Fabric Area: N/A
Distribution of fabric usage between tablecloth and napkins.

Understanding Table Linen Calculations

What is a Table Linen Calculator?

A table linen calculator is a specialized tool designed to help individuals and businesses accurately determine the amount of fabric required to create various types of table linens, such as tablecloths, placemats, runners, and napkins. It takes into account essential dimensions like table size, desired fabric overhang (drop), napkin dimensions, and importantly, the width of the fabric roll you are using. This table linen calculator simplifies the often complex task of fabric yardage calculation, minimizing waste and ensuring you have enough material for your project.

This tool is invaluable for anyone involved in sewing, interior design, event planning, or hospitality management. Whether you're a home sewer crafting a new set of dining cloths or a business outfitting a restaurant, precise fabric measurement is key. Common misconceptions include underestimating the impact of fabric width or neglecting to account for necessary seam and hem allowances, leading to insufficient material.

Table Linen Fabric Calculation Formula and Mathematical Explanation

The core of the table linen calculator relies on calculating the surface area needed for each linen item and then optimizing this based on fabric width. The formula considers several factors:

1. Tablecloth Fabric Area:

  • Tablecloth Length = Table Length + (2 * Desired Drop Length) + (2 * Seam Allowance)
  • Tablecloth Width = Table Width + (2 * Desired Drop Length) + (2 * Seam Allowance)
  • Tablecloth Surface Area = Tablecloth Length * Tablecloth Width

2. Napkin Fabric Area:

  • Single Napkin Cut Size = Napkin Size + (2 * Seam Allowance)
  • Area Per Napkin = Single Napkin Cut Size * Single Napkin Cut Size
  • Total Napkin Area = Area Per Napkin * Number of Napkins

3. Total Fabric Required (considering fabric width):

This is the most complex part. The calculator determines how many widths of fabric are needed to cut out all the required pieces (tablecloth and napkins) efficiently. The calculation aims to minimize waste by arranging the cuts optimally on the fabric roll. A simplified approach involves calculating the total linear centimeters of fabric needed along the roll's length based on the total area required and the fabric width.

  • Total Required Area (cm²) = Tablecloth Surface Area + Total Napkin Area
  • Total Fabric Length Needed (cm) = Total Required Area (cm²) / Fabric Roll Width (cm)
  • Total Fabric Area (m²) = (Total Fabric Length Needed (cm) * Fabric Roll Width (cm)) / 10000
  • Total Fabric Area (yards) = Total Fabric Area (m²) * 1.09361

The actual cutting layout optimization can be complex, involving nesting shapes. Our calculator uses a practical approach to estimate the total linear fabric length required based on the total area needed and the available fabric width.

Variable Definitions:

Variable Meaning Unit Typical Range
Table Length The longer dimension of the dining surface. cm 50 – 300+
Table Width The shorter dimension of the dining surface. cm 50 – 150+
Desired Drop Length How far the linen should hang below the table edge. cm 15 – 40
Napkin Size Side length of a square napkin. cm 30 – 60
Number of Napkins Total count of napkins required. Count 0 – 50+
Fabric Roll Width The width of the fabric as purchased on a roll. cm 110 – 300+
Seam Allowance per Edge Extra fabric added for hems and seams. cm 1 – 5
Tablecloth Surface Area The calculated area for the main tablecloth. 0.5 – 10+
Total Napkin Area Combined area of all required napkins. 0 – 5+
Total Fabric Needed The final estimate of fabric required. m² / yards 1 – 15+

Practical Examples (Real-World Use Cases)

Example 1: Standard Dining Tablecloth

Imagine you have a rectangular dining table measuring 180 cm long by 90 cm wide. You want a classic drop of 30 cm on all sides and plan to use a fabric that is 150 cm wide. You'll need a 2 cm seam allowance for hems.

  • Inputs: Table Length = 180 cm, Table Width = 90 cm, Desired Drop = 30 cm, Fabric Width = 150 cm, Seam Allowance = 2 cm, Napkins = 0
  • Calculations:
    • Tablecloth Length = 180 + (2 * 30) + (2 * 2) = 180 + 60 + 4 = 244 cm
    • Tablecloth Width = 90 + (2 * 30) + (2 * 2) = 90 + 60 + 4 = 154 cm
    • Tablecloth Surface Area = 244 cm * 154 cm = 37576 cm² = 3.76 m²
    • Total Fabric Needed (approx.) = (3.76 m² * 10000 cm²/m²) / 150 cm = 250.5 cm length
    • Total Fabric Area = 250.5 cm * 150 cm = 37575 cm² = 3.76 m²
    • Total Fabric Area = 3.76 m² * 1.09361 ≈ 4.11 yards
  • Result: You would need approximately 3.76 m² (or 4.11 yards) of fabric. Notice the tablecloth width (154 cm) is slightly wider than the fabric roll (150 cm). This calculator will adjust the total yardage needed, potentially requiring you to piece fabric or use a different fabric width. For a 150cm wide fabric, you might need to buy ~3.8 m to accommodate the needed 154cm width, and the calculator would reflect the total area needed based on optimal cutting.

Example 2: Tablecloth with Matching Napkins

Consider a smaller, square table: 100 cm x 100 cm. You desire a 25 cm drop and want 8 napkins, each finishing at 45 cm x 45 cm. The fabric is a wide 280 cm.

  • Inputs: Table Length = 100 cm, Table Width = 100 cm, Desired Drop = 25 cm, Napkin Size = 45 cm, Number of Napkins = 8, Fabric Width = 280 cm, Seam Allowance = 2 cm
  • Calculations:
    • Tablecloth Length = 100 + (2 * 25) + (2 * 2) = 100 + 50 + 4 = 154 cm
    • Tablecloth Width = 100 + (2 * 25) + (2 * 2) = 100 + 50 + 4 = 154 cm
    • Tablecloth Surface Area = 154 cm * 154 cm = 23716 cm² = 2.37 m²
    • Single Napkin Cut Size = 45 + (2 * 2) = 49 cm
    • Area Per Napkin = 49 cm * 49 cm = 2401 cm²
    • Total Napkin Area = 2401 cm² * 8 = 19208 cm² = 1.92 m²
    • Total Required Area = 2.37 m² + 1.92 m² = 4.29 m²
    • Total Fabric Length Needed (approx.) = (4.29 m² * 10000 cm²/m²) / 280 cm = 153.2 cm length
    • Total Fabric Area = 153.2 cm * 280 cm = 42896 cm² = 4.29 m²
    • Total Fabric Area = 4.29 m² * 1.09361 ≈ 4.69 yards
  • Result: You would need approximately 4.29 m² (or 4.69 yards) of fabric. With a wide 280 cm fabric, you can likely cut both the tablecloth and all 8 napkins from a single length of fabric, demonstrating the advantage of wider rolls.

How to Use This Table Linen Calculator

Using the table linen calculator is straightforward:

  1. Enter Table Dimensions: Input the length and width of your table in centimeters.
  2. Specify Drop Length: Enter how far you want the fabric to hang below the table edge (e.g., 25 cm for a casual look, 40 cm for a formal drape).
  3. Input Napkin Details (Optional): If you are making napkins, enter the finished size (e.g., 45 cm) and the total number you need. Leave these blank if no napkins are required.
  4. Enter Fabric Width: Crucially, input the width of the fabric roll you plan to use (e.g., 150 cm, 280 cm). This significantly impacts how much fabric you need.
  5. Add Seam Allowance: Specify the amount for hems or seams on each edge (usually 1-3 cm).
  6. Click Calculate: The calculator will instantly provide:
    • The estimated total fabric area needed in square meters (m²).
    • The total fabric area needed in yards.
    • Breakdowns for tablecloth and napkin areas.
    • A visual representation via a chart.
  7. Interpret Results: The primary result shows the total fabric you should purchase. Use the intermediate values and the table to understand the distribution of fabric usage.
  8. Make Decisions: Use these figures to buy the correct amount of fabric, ensuring you have enough material without excessive waste. Consider if your fabric width is suitable for the required tablecloth dimensions without piecing.
  9. Reset: If you need to start over or try different scenarios, click the 'Reset' button to clear all fields.
  10. Copy Results: Use the 'Copy Results' button to easily transfer the calculated figures and assumptions to a notepad or other document.

Key Factors That Affect Table Linen Calculator Results

Several factors influence the accuracy and outcome of your table linen calculator results:

  1. Table Dimensions: The most fundamental inputs. Larger tables naturally require more fabric.
  2. Desired Drop Length: A longer drop significantly increases the fabric needed, especially for the width dimension. Formal settings often have longer drops.
  3. Fabric Roll Width: This is critical. A narrower fabric roll might necessitate purchasing more linear length or even piecing fabric together to achieve the required tablecloth width, dramatically increasing waste and total yardage. Wide fabrics (e.g., 280 cm+) are often more efficient for larger projects.
  4. Napkin Size and Quantity: While individual napkins are small, a large quantity can add substantially to the total fabric requirement. The calculator ensures this is factored in.
  5. Seam and Hem Allowances: Not accounting for these means your finished linen might be too small. Adding 1-3 cm per edge is standard practice.
  6. Fabric Pattern/Nap: While not directly calculated here, consider if your fabric has a directional pattern or nap. You might need extra fabric to ensure patterns match across seams or that the nap runs consistently.
  7. Shrinkage: Most natural fabrics (like cotton and linen) will shrink when washed. Pre-washing your fabric before cutting and adding extra allowance (sometimes considered within seam allowance or as a separate buffer) is crucial. This calculator assumes fabric is cut to size and doesn't pre-account for shrinkage, so consider buying slightly more if pre-washing.
  8. Cutting Efficiency: The calculator estimates efficient cutting. Complex shapes or awkward fabric widths can sometimes lead to less optimal layouts in practice, resulting in needing slightly more fabric than calculated.

Frequently Asked Questions (FAQ)

Q1: Do I need to add extra fabric for shrinkage?
Yes, it's highly recommended. Pre-wash your fabric according to its care instructions before cutting and consider adding an extra 5-10% to your total fabric purchase, or factor this into your seam/hem allowance.
Q2: My calculated tablecloth width is wider than my fabric roll. What should I do?
This is common with standard fabric widths. You have a few options: 1) Purchase fabric wide enough (often 280cm+) which might be more expensive per yard but requires less length. 2) Piece two or more widths together. This requires careful seam placement and potentially adding extra width for the seam. 3) Adjust your desired drop length to fit the fabric width.
Q3: What's the difference between a tablecloth drop and a seam allowance?
The drop length is the decorative overhang you want, measured from the table edge to the bottom of the linen. The seam allowance is the extra fabric needed for construction, like folding and sewing hems.
Q4: Can I use this calculator for round tables?
This calculator is designed for rectangular tables. For round tables, you would calculate the diameter (including desired drop on all sides) and use that as both the length and width input.
Q5: How precise are the results?
The results are estimates designed to be highly practical. They account for standard measurements and allowances. However, actual fabric usage can vary slightly based on specific pattern pieces, cutting skill, and fabric characteristics.
Q6: Does the calculator account for fabric pattern matching?
No, this calculator does not specifically account for intricate pattern matching across seams. If your fabric requires precise pattern alignment, you may need to purchase extra yardage.
Q7: What units does the calculator use?
All length and width inputs should be in centimeters (cm). The final results are provided in square meters (m²) and yards.
Q8: Is it better to buy fabric in meters or yards?
Fabric is typically sold by the linear yard or meter. The calculator provides both, allowing you to use the unit most common in your region or preferred for purchasing.

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(napkinSize.toFixed(0) + ' x ' + napkinSize.toFixed(0) + ' cm (finished)') : 'N/A'); document.getElementById('napkinAreaSingle').textContent = (areaPerNapkinCm2 > 0 ? (areaPerNapkinCm2 / 10000).toFixed(2) : 'N/A'); document.getElementById('napkinAreaTotal').textContent = totalNapkinAreaM2.toFixed(2); document.getElementById('tableTotalFabricArea').textContent = totalFabricAreaM2.toFixed(2); // Update chart updateChart(tableclothSurfaceAreaM2, totalNapkinAreaM2); // Show results section document.getElementById('resultContainer').style.display = 'block'; document.getElementById('noResultsMessage').style.display = 'none'; } function updateChart(tableclothArea, napkinArea) { var ctx = document.getElementById('fabricUsageChart').getContext('2d'); // Destroy previous chart instance if it exists if (window.fabricChartInstance) { window.fabricChartInstance.destroy(); } var totalArea = tableclothArea + napkinArea; var tableclothPercentage = totalArea > 0 ? (tableclothArea / totalArea) * 100 : 0; var napkinPercentage = totalArea > 0 ? (napkinArea / totalArea) * 100 : 0; // Adjust percentages if one is zero to avoid rounding issues and ensure sum is 100% if (tableclothArea === 0 && napkinArea === 0) { tableclothPercentage = 50; napkinPercentage = 50; } else if (tableclothArea === 0) { tableclothPercentage = 0; napkinPercentage = 100; } else if (napkinArea === 0) { tableclothPercentage = 100; napkinPercentage = 0; } window.fabricChartInstance = new Chart(ctx, { type: 'bar', data: { labels: ['Fabric Usage'], datasets: [{ label: 'Tablecloth', data: [tableclothArea.toFixed(2)], backgroundColor: 'rgba(0, 74, 153, 0.7)', // Primary color variant borderColor: 'rgba(0, 74, 153, 1)', borderWidth: 1 }, { label: 'Napkins', data: [napkinArea.toFixed(2)], backgroundColor: 'rgba(40, 167, 69, 0.7)', // Success color variant borderColor: 'rgba(40, 167, 69, 1)', borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Area (m²)' } } }, plugins: { legend: { position: 'top', }, title: { display: true, text: 'Fabric Area Distribution' } } } }); } function copyResults() { var resultText = "Table Linen Calculation Results:\n\n"; resultText += "Main Result: " + document.getElementById('mainResult').innerText + "\n"; resultText += document.getElementById('tableclothArea').innerText + "\n"; resultText += document.getElementById('napkinArea').innerText + "\n"; resultText += document.getElementById('totalFabricNeeded').innerText + "\n"; resultText += document.getElementById('fabricYards').innerText + "\n\n"; resultText += "Key Assumptions:\n"; resultText += "- Fabric Roll Width: " + document.getElementById('assumptionFabricWidth').textContent + " cm\n"; resultText += "- Seam Allowance per Edge: " + document.getElementById('assumptionSeamAllowance').textContent + " cm\n"; // Add table data resultText += "\nFabric Usage Breakdown:\n"; var table = document.getElementById('resultsTableBody'); for (var i = 0; i 0) { if(row.cells.length === 4) { // Regular data row resultText += "- " + row.cells[0].textContent + ": " + row.cells[3].textContent + " (Area: " + row.cells[2].textContent + ")\n"; } else if (row.cells.length === 2) { // Total row resultText += "- " + row.cells[0].textContent + " " + row.cells[1].textContent + "\n"; } } } // Use a temporary textarea to copy to clipboard var textArea = document.createElement("textarea"); textArea.value = resultText; textArea.style.position = "fixed"; // Avoid scrolling to bottom 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!' : 'Copying failed!'; // Optional: Show a temporary message to the user var notification = document.createElement('div'); notification.textContent = msg; notification.style.cssText = 'position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); background-color: var(–success-color); color: white; padding: 15px; border-radius: 5px; z-index: 1000;'; document.body.appendChild(notification); setTimeout(function() { document.body.removeChild(notification); }, 2000); } catch (err) { console.error('Fallback: Oops, unable to copy', err); // Optional: Show error message } document.body.removeChild(textArea); } function resetCalculator() { document.getElementById('tableLength').value = '180'; document.getElementById('tableWidth').value = '90'; document.getElementById('tableDrop').value = '30'; document.getElementById('napkinSize').value = '45'; document.getElementById('napkinQuantity').value = '8'; document.getElementById('fabricWidth').value = '150'; document.getElementById('seamAllowance').value = '2'; // Clear errors var errorElements = document.getElementsByClassName('error-message'); for (var i = 0; i < errorElements.length; i++) { errorElements[i].textContent = ''; } // Reset results display document.getElementById('resultContainer').style.display = 'none'; document.getElementById('noResultsMessage').style.display = 'block'; document.getElementById('mainResult').innerHTML = '0 m²'; document.getElementById('tableclothArea').innerHTML = 'Tablecloth Area: 0 m²'; document.getElementById('napkinArea').innerHTML = 'Total Napkin Area: 0 m²'; document.getElementById('totalFabricNeeded').innerHTML = 'Total Fabric Needed: 0 m²'; document.getElementById('fabricYards').innerHTML = 'Total Fabric Needed: 0 yards'; // Reset table document.getElementById('tableDim').textContent = 'N/A'; document.getElementById('tableAreaSingle').textContent = 'N/A'; document.getElementById('tableAreaTotal').textContent = 'N/A'; document.getElementById('napkinDim').textContent = 'N/A'; document.getElementById('napkinAreaSingle').textContent = 'N/A'; document.getElementById('napkinAreaTotal').textContent = 'N/A'; document.getElementById('tableTotalFabricArea').textContent = 'N/A'; // Reset chart if (window.fabricChartInstance) { window.fabricChartInstance.destroy(); window.fabricChartInstance = null; // Clear the instance } var canvas = document.getElementById('fabricUsageChart'); var ctx = canvas.getContext('2d'); ctx.clearRect(0, 0, canvas.width, canvas.height); // Clear canvas content } // Initial calculation on page load if values are pre-filled (optional) // document.addEventListener('DOMContentLoaded', function() { // calculateLinen(); // }); // Add Chart.js library dependency – MUST BE INCLUDED ELSEWHERE OR ADDED HERE // For this self-contained HTML, you'd typically need to include Chart.js via CDN // Example: // Since this must be a single file, we assume Chart.js is available or injected. // To make this truly self-contained without external libs, you'd need SVG or Canvas API directly. // For this example, we proceed assuming Chart.js is available. // If Chart.js is not available, the canvas will remain empty. // Mock Chart object for demonstration if Chart.js is not loaded if (typeof Chart === 'undefined') { console.warn('Chart.js not loaded. Chart will not be displayed.'); window.Chart = function() { this.destroy = function() {}; }; window.Chart.defaults = {}; // Prevent errors window.Chart.register = function() {}; // Prevent errors } // Initial call to set default values if not handled by placeholder input values document.addEventListener('DOMContentLoaded', function() { // Ensure the calculator is visible and default values are set correctly for the first calculation document.getElementById('noResultsMessage').style.display = 'block'; document.getElementById('resultContainer').style.display = 'none'; // Set default values in inputs if they are empty if (!document.getElementById('tableLength').value) document.getElementById('tableLength').value = '180'; if (!document.getElementById('tableWidth').value) document.getElementById('tableWidth').value = '90'; if (!document.getElementById('tableDrop').value) document.getElementById('tableDrop').value = '30'; if (!document.getElementById('napkinSize').value) document.getElementById('napkinSize').value = '45'; if (!document.getElementById('napkinQuantity').value) document.getElementById('napkinQuantity').value = '8'; if (!document.getElementById('fabricWidth').value) document.getElementById('fabricWidth').value = '150'; if (!document.getElementById('seamAllowance').value) document.getElementById('seamAllowance').value = '2'; // Trigger calculation on load IF default values were set, or remove this if you want manual trigger only // calculateLinen(); });

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