Wallpaper Removal Cost Calculator

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Wallpaper Removal Cost Calculator

Estimate the cost to remove wallpaper from your home with our easy-to-use tool.

Wallpaper Removal Cost Estimator

Enter the total square footage of the area where wallpaper needs to be removed.
1 Layer 2 Layers 3 Layers 4+ Layers (More complex)
More layers generally mean more time and effort.
Vinyl / Washable Traditional Paper Fabric / Textured Old Peel-and-Stick (Can be stubborn)
Some materials are harder to remove than others.
Good (minimal damage, smooth surface underneath) Fair (some minor damage, small holes, unevenness) Poor (significant damage, deep gouges, uneven drywall)
This accounts for potential repair time after removal.
Average hourly rate for a professional wallpaper removal service in your area.

Estimated Costs

$0.00
Estimated Time (Hours): 0
Estimated Labor Cost: $0.00
Estimated Repair Cost (if needed): $0.00

The total cost is calculated based on estimated labor hours and hourly rate, plus an allowance for wall repairs. Different wallpaper types, layers, and wall conditions impact the time and repair needs.

Cost Breakdown Table

Component Details Estimated Cost
Labor $0.00
Wall Repair $0.00
Total Estimated Cost Based on inputs $0.00
Estimated costs for wallpaper removal. Hover or scroll for details.

Factors Influencing Time and Cost

Factor Impact on Time/Cost Notes
Wallpaper LayersHighMore layers = significantly more time.
Wallpaper TypeMediumVinyl and fabric can be tougher than paper.
Adhesive TypeMediumOlder, stronger adhesives add difficulty.
Wall Surface PrepHighIncludes cleaning, sanding, priming after removal.
Wall DamageHighRepairing drywall adds substantial cost and time.
Professional vs. DIYHighProfessional labor is the largest cost component.
Key factors affecting your wallpaper removal project.

Estimated Time vs. Cost Projection

Chart showing the relationship between estimated hours and total cost.

What is Wallpaper Removal Cost?

The wallpaper removal cost refers to the total expenses incurred when having existing wallpaper taken off the walls of a home or commercial space. This cost typically encompasses labor, materials, and any necessary wall preparation or repairs that follow the removal process. It's a crucial consideration for homeowners and property managers undertaking renovations or redecorating projects, as wallpaper removal can sometimes be more labor-intensive and costly than anticipated, especially with older homes or certain types of wallpaper.

Understanding the average wallpaper removal cost helps in budgeting accurately. This process isn't just about peeling off the paper; it often involves steaming, scraping, applying chemical removers, and extensive cleaning. The underlying wall condition also plays a significant role, as damage beneath the wallpaper, such as holes, cracks, or residual adhesive, will necessitate additional repair work, increasing the overall project expense. Our calculator aims to provide a clear estimate based on common variables.

Factors like the square footage of the area, the number of wallpaper layers, the specific type of wallpaper (e.g., vinyl, paper, fabric), and the condition of the walls underneath all contribute to the final wallpaper removal cost. Professional services often charge by the hour or by the square foot, and their rates vary by region. This calculator provides a tool to demystify these costs and plan your project effectively.

Wallpaper Removal Cost Formula and Mathematical Explanation

The calculation for the wallpaper removal cost can be broken down into several key components. While specific professional pricing may vary, a common estimation formula considers the direct labor involved and potential repair work.

Core Formula:

Total Estimated Cost = (Estimated Labor Hours * Hourly Labor Rate) + Estimated Repair Cost

Breakdown of Components:

  • Estimated Labor Hours: This is determined by the complexity of the removal. It's influenced by:
    • Square Footage: Larger areas naturally take longer.
    • Number of Layers: Each additional layer significantly increases removal time.
    • Wallpaper Type: Vinyl and fabric wallpapers often require more effort than traditional paper. Old, stubborn adhesives can also extend time.
    A baseline time per square foot is established, then adjusted based on these factors. For example, a simple 1-layer paper removal might be 0.2 hours per 100 sq ft, while a 3-layer vinyl could jump to 1.5 hours per 100 sq ft.
  • Hourly Labor Rate: This is the cost charged by professionals per hour of work. It varies based on geographic location, experience of the crew, and demand for services. Our calculator uses an input field for this variable.
  • Estimated Repair Cost: After wallpaper is removed, walls often need attention. This includes:
    • Sanding down residual adhesive.
    • Filling small holes or gouges.
    • Repairing damaged drywall.
    • Priming the walls for new paint or wallpaper.
    The severity of the wall condition (good, fair, poor) dictates the estimated time and materials needed for repairs. A 'poor' condition might involve patching drywall, adding significant time and cost. This can be estimated as a fixed amount or a percentage of the labor cost, depending on the severity.

Mathematical Logic in the Calculator:

Our calculator uses a simplified model to estimate labor hours. It starts with a base time (e.g., 0.3 hours per 100 sq ft) and applies multipliers:

  • Layers Multiplier: 1 layer = 1x, 2 layers = 1.5x, 3 layers = 2x, 4+ layers = 2.5x.
  • Wallpaper Type Multiplier: Paper = 1x, Vinyl = 1.3x, Fabric/Textured = 1.6x, Old Peel/Stick = 1.8x.
  • Estimated Time = (Square Footage / 100) * Base Rate * Layers Multiplier * Wallpaper Type Multiplier

Repair costs are estimated based on the wall condition: Good = 10% of Labor Cost, Fair = 30% of Labor Cost, Poor = 60% of Labor Cost. The total wallpaper removal cost is then the sum of these calculated labor and repair costs.

Practical Examples (Real-World Use Cases)

Let's explore a few scenarios to understand how the wallpaper removal cost can vary:

Example 1: Standard Room Removal

  • Scenario: A homeowner wants to remove a single layer of traditional paper wallpaper from a bedroom measuring 300 sq ft. The walls are in good condition underneath. They have a professional service lined up with a $60/hour labor rate.
  • Inputs:
    • Square Footage: 300 sq ft
    • Layers: 1 Layer
    • Wallpaper Type: Traditional Paper
    • Wall Condition: Good
    • Labor Rate: $60/hr
  • Calculation:
    • Base Time: (300 / 100) * 0.3 = 0.9 hours
    • Layers Multiplier: 1x
    • Type Multiplier: 1x
    • Estimated Time: 0.9 * 1 * 1 = 0.9 hours (approx. 1 hour)
    • Labor Cost: 1 hour * $60/hr = $60
    • Repair Cost (10% of Labor): 0.10 * $60 = $6
    • Total Estimated Cost: $60 + $6 = $66
  • Note: This is a very simple case. Professionals might charge a minimum fee, often higher than this calculation, for small jobs.

Example 2: Multi-Layer Vinyl in a Dining Room

  • Scenario: A homeowner is renovating a dining room (400 sq ft) that has two layers of thick vinyl wallpaper. The walls underneath are in fair condition, with some small gouges. The local professional labor rate is $75/hour.
  • Inputs:
    • Square Footage: 400 sq ft
    • Layers: 2 Layers
    • Wallpaper Type: Vinyl
    • Wall Condition: Fair
    • Labor Rate: $75/hr
  • Calculation:
    • Base Time: (400 / 100) * 0.3 = 1.2 hours
    • Layers Multiplier: 1.5x
    • Type Multiplier: 1.3x
    • Estimated Time: 1.2 * 1.5 * 1.3 = 2.34 hours (approx. 2.5 hours)
    • Labor Cost: 2.5 hours * $75/hr = $187.50
    • Repair Cost (30% of Labor): 0.30 * $187.50 = $56.25
    • Total Estimated Cost: $187.50 + $56.25 = $243.75
  • Note: This estimate reflects the increased difficulty of removing multiple vinyl layers and minor wall repairs.

Example 3: Challenging Removal in a Bathroom

  • Scenario: An older bathroom (150 sq ft) has multiple layers of possibly glued-on fabric wallpaper. The walls are in poor condition, with significant damage and water staining near the shower area, requiring patching. The labor rate is $70/hour.
  • Inputs:
    • Square Footage: 150 sq ft
    • Layers: 4+ Layers
    • Wallpaper Type: Fabric / Textured
    • Wall Condition: Poor
    • Labor Rate: $70/hr
  • Calculation:
    • Base Time: (150 / 100) * 0.3 = 0.45 hours
    • Layers Multiplier: 2.5x
    • Type Multiplier: 1.6x
    • Estimated Time: 0.45 * 2.5 * 1.6 = 1.8 hours (approx. 2 hours)
    • Labor Cost: 2 hours * $70/hr = $140
    • Repair Cost (60% of Labor): 0.60 * $140 = $84
    • Total Estimated Cost: $140 + $84 = $224
  • Note: Even with a smaller area, the combination of difficult wallpaper and poor wall condition significantly increases the estimated wallpaper removal cost, particularly the repair component. Professionals might quote higher due to the unpredictable nature of such jobs.

How to Use This Wallpaper Removal Cost Calculator

Using our wallpaper removal cost calculator is straightforward and designed to give you a quick, estimated quote for your project. Follow these simple steps:

  1. Measure Your Space: Accurately measure the total square footage (width x height) of all walls from which you need to remove wallpaper. Enter this number into the "Area to Remove (Sq. Ft.)" field. Precision here is key for an accurate estimate.
  2. Identify Wallpaper Layers: Determine how many layers of wallpaper are currently on your walls. If you're unsure, assume there might be more than one, especially in older homes. Select the appropriate option from the "Number of Wallpaper Layers" dropdown. More layers mean more time and effort.
  3. Specify Wallpaper Type: Choose the type of wallpaper you are removing from the "Wallpaper Type" dropdown. Materials like vinyl or heavily textured wallpapers can be more challenging to remove than standard paper.
  4. Assess Wall Condition: Carefully evaluate the condition of the walls after the wallpaper is removed (or the condition visible through it if you can't remove a test patch). Select "Good," "Fair," or "Poor" based on whether there's minimal damage, some minor flaws, or significant drywall damage and imperfections. This directly impacts the repair cost estimate.
  5. Input Labor Rate: Enter the estimated hourly labor rate for professional services in your specific geographic area. You can often find this information by searching local contractor rates or getting preliminary quotes.
  6. Calculate: Click the "Calculate Cost" button. The calculator will instantly display the primary estimated total cost, along with key intermediate values like estimated time and labor cost.
  7. Review Details: Examine the breakdown table and chart for a clearer picture of the cost components and how different factors influence the estimate.
  8. Reset or Copy: Use the "Reset" button to clear the fields and start over with new inputs. Use the "Copy Results" button to easily transfer the calculated data for your records or to share with a contractor.

Remember, this calculator provides an estimate. The actual wallpaper removal cost can vary based on unforeseen issues, specific contractor pricing, and regional market conditions. It's always recommended to get quotes from multiple professionals for your project.

Key Factors That Affect Wallpaper Removal Cost

Several variables significantly influence the final wallpaper removal cost. Understanding these factors can help you prepare for the project and potentially manage expenses:

1. Square Footage:

The most straightforward factor. More wall surface area to cover naturally requires more time and labor, directly increasing the overall cost. A larger room will inherently cost more to strip than a small powder room.

2. Number of Layers:

Older homes or rooms that have been redecorated multiple times might have several layers of wallpaper. Each layer adds significant time and effort to the removal process, often requiring more potent solutions or prolonged steaming.

3. Type of Wallpaper:

Not all wallpapers are created equal when it comes to removal.

  • Traditional Paper: Generally the easiest to remove, often dissolving with water or steam.
  • Vinyl/Washable: These have a protective top layer that makes them resistant to water, requiring scoring the surface before applying removers, thus increasing labor.
  • Fabric/Textured: Can be difficult as the texture may hide multiple layers or adhesive types, and fabric itself can be challenging to get cleanly off the wall.
  • Peel-and-Stick: While designed for easy removal, older installations or those applied to unprepared surfaces can leave behind sticky residue that is difficult to clean.
The type directly impacts the difficulty and time needed.

4. Adhesive Strength and Type:

The type and age of the adhesive used are critical. Some old adhesives were formulated to be extremely strong and permanent. Removing stubborn, dried adhesive can be one of the most time-consuming parts of the job.

5. Wall Condition and Material:

What lies beneath the wallpaper is crucial. Drywall is common, but plaster walls present different challenges. More importantly, the condition of the underlying surface matters:

  • Minor Damage: Small nail pops, nail holes, or minor dings add minimal time for filling and sanding.
  • Significant Damage: Deep gouges, water damage, or crumbling plaster require substantial patching, sanding, and potentially even replacing sections of drywall, significantly increasing labor and material costs.
This is often the most unpredictable cost factor.

6. Labor Rates:

Professional tradespeople's hourly rates vary considerably by region, experience, and the demand for their services. High cost-of-living areas or specialized services will command higher rates.

7. Accessibility:

Difficult-to-reach areas, such as high ceilings or tightly confined spaces, might require special equipment (like scaffolding) or add extra time due to awkward positioning, potentially increasing the wallpaper removal cost.

8. Prep and Cleanup:

The quote should ideally include time for protecting surrounding areas, thorough cleaning of debris and dust, and preparing the walls for the next step (painting or new wallpaper). Factor in that this adds to the overall project duration and cost.

Frequently Asked Questions (FAQ)

Is wallpaper removal messy?
Yes, wallpaper removal can be quite messy. It often involves water, steam, scrapers, and potentially chemical solutions, leading to debris, dust, and residue. Professionals will take steps to protect your space, but expect some cleanup afterward.
Can I remove wallpaper myself, or should I hire a professional?
DIY wallpaper removal is possible for simpler jobs (single layer, paper type) and can save money on labor. However, for multiple layers, difficult types, or if you suspect underlying wall damage, hiring a professional is often recommended. They have the tools, experience, and techniques to do the job efficiently and minimize wall damage, ultimately potentially saving you time and money on repairs.
How long does wallpaper removal typically take?
The time can vary greatly. A simple 200 sq ft room with one layer of paper might take a professional 2-4 hours. However, a large room with multiple layers of vinyl wallpaper and damaged walls could take a full day or even longer, especially if significant drywall repair is needed afterward. Our calculator provides an estimated time based on your inputs.
What is the average cost per square foot for wallpaper removal?
While our calculator estimates based on hourly rates, professional wallpaper removal can range from $1 to $3 per square foot, sometimes more for complex jobs. This typically includes basic cleanup but may not cover extensive drywall repair. Our calculator's total cost estimate aims to reflect a similar range, factoring in labor and potential repairs.
Do I need to prime the walls after removing wallpaper?
Yes, priming is highly recommended after wallpaper removal, especially if there's any residual adhesive or if the walls have been patched or sanded. Primer seals the surface, ensures even paint absorption, and provides a better base for new paint or wallpaper.
What if the wallpaper is glued directly to plaster?
Wallpaper removal from plaster walls can be trickier. Plaster can be more porous and susceptible to damage from water or scraping. Professionals often use specific techniques for plaster, like scoring the paper and using specific removers, to minimize damage. Repairing plaster can also be different from drywall repair.
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var squareFootageInput = document.getElementById('squareFootage'); var layersSelect = document.getElementById('layers'); var wallpaperTypeSelect = document.getElementById('wallpaperType'); var wallConditionSelect = document.getElementById('wallCondition'); var laborRateInput = document.getElementById('laborRate'); var squareFootageError = document.getElementById('squareFootageError'); var laborRateError = document.getElementById('laborRateError'); var totalCostDisplay = document.getElementById('totalCost'); var timeEstimateDisplay = document.getElementById('timeEstimate').querySelector('span:last-child'); var laborCostDisplay = document.getElementById('laborCost').querySelector('span:last-child'); var repairCostDisplay = document.getElementById('repairCost').querySelector('span:last-child'); var laborCostTable = document.getElementById('laborCostTable'); var repairCostTable = document.getElementById('repairCostTable'); var totalCostTable = document.getElementById('totalCostTable'); var laborDetail = document.getElementById('laborDetail'); var repairDetail = document.getElementById('repairDetail'); var chart = null; var ctx = document.getElementById('costProjectionChart').getContext('2d'); var baseRatePer100SqFt = 0.3; // Hours per 100 sq ft for basic removal var layersMultipliers = { '1': 1.0, '2': 1.5, '3': 2.0, '4': 2.5 }; var typeMultipliers = { 'paper': 1.0, 'vinyl': 1.3, 'fabric': 1.6, 'oldPeelAndStick': 1.8 }; var repairCostPercentages = { 'good': 0.10, 'fair': 0.30, 'poor': 0.60 }; function formatCurrency(amount) { return "$" + amount.toFixed(2); } function validateInputs() { var valid = true; if (squareFootageInput.value === "" || parseFloat(squareFootageInput.value) <= 0) { squareFootageError.textContent = "Please enter a valid area in square feet."; valid = false; } else { squareFootageError.textContent = ""; } if (laborRateInput.value === "" || parseFloat(laborRateInput.value) <= 0) { laborRateError.textContent = "Please enter a valid hourly labor rate."; valid = false; } else { laborRateError.textContent = ""; } return valid; } function calculateCost() { if (!validateInputs()) { return; } var sqFt = parseFloat(squareFootageInput.value); var layers = layersSelect.value; var wallpaperType = wallpaperTypeSelect.value; var wallCondition = wallConditionSelect.value; var laborRate = parseFloat(laborRateInput.value); // Calculate Estimated Hours var baseHours = (sqFt / 100) * baseRatePer100SqFt; var layersMultiplier = layersMultipliers[layers] || 1.0; var typeMultiplier = typeMultipliers[wallpaperType] || 1.0; var estimatedHours = baseHours * layersMultiplier * typeMultiplier; // Calculate Labor Cost var laborCost = estimatedHours * laborRate; // Calculate Repair Cost var repairCostPercentage = repairCostPercentages[wallCondition] || 0.10; var estimatedRepairCost = laborCost * repairCostPercentage; // Calculate Total Cost var totalCost = laborCost + estimatedRepairCost; // Update Displays totalCostDisplay.textContent = formatCurrency(totalCost); timeEstimateDisplay.textContent = estimatedHours.toFixed(1); 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repairCostDisplay.textContent = '$0.00'; laborCostTable.textContent = '$0.00'; repairCostTable.textContent = '$0.00'; totalCostTable.textContent = '$0.00'; laborDetail.textContent = '–'; repairDetail.textContent = '–'; if (chart) { chart.destroy(); } // Reset chart to initial state or clear it ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); // Optionally draw a blank chart or placeholder ctx.font = "16px Segoe UI"; ctx.fillStyle = "#777"; ctx.textAlign = "center"; ctx.fillText("Enter inputs and click 'Calculate Cost' to see data.", ctx.canvas.width/2, ctx.canvas.height/2); } function copyResults() { var resultsText = "Wallpaper Removal Cost Estimate:\n\n"; resultsText += "Total Estimated Cost: " + totalCostDisplay.textContent + "\n"; resultsText += "Estimated Time: " + timeEstimateDisplay.textContent + " Hours\n"; resultsText += "Estimated Labor Cost: " + laborCostDisplay.textContent + "\n"; resultsText += "Estimated Repair Cost: " + repairCostDisplay.textContent + "\n\n"; resultsText += "Key Assumptions:\n"; resultsText += "- Area: " + squareFootageInput.value + " sq ft\n"; resultsText += "- Layers: " + layersSelect.options[layersSelect.selectedIndex].text + "\n"; resultsText += "- Wallpaper Type: " + wallpaperTypeSelect.options[wallpaperTypeSelect.selectedIndex].text + "\n"; resultsText += "- Wall Condition: " + wallConditionSelect.options[wallConditionSelect.selectedIndex].text + "\n"; resultsText += "- Labor Rate: $" + laborRateInput.value + "/Hour\n"; // Use a temporary textarea to copy text var textArea = document.createElement("textarea"); textArea.value = resultsText; textArea.style.position = "fixed"; textArea.style.left = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied successfully!' : 'Failed to copy results.'; console.log(msg); // Optionally show a temporary notification var copyButton = document.querySelector('.copy-button'); var originalText = copyButton.textContent; copyButton.textContent = 'Copied!'; setTimeout(function(){ copyButton.textContent = originalText; }, 2000); } catch (err) { console.error('Unable to copy', err); } document.body.removeChild(textArea); } function updateChart(hours, cost) { if (chart) { chart.destroy(); } // Create sample data points to illustrate the trend // We'll use the current inputs as one data point and generate a few others based on logic var chartDataPoints = []; var currentSqFt = parseFloat(squareFootageInput.value) || 200; var currentLayers = layersSelect.value || '1'; var currentType = wallpaperTypeSelect.value || 'paper'; var currentRate = parseFloat(laborRateInput.value) || 50; // Generate a few points around the current estimate for (var h = Math.max(1, hours – 2); h 0) { // Ensure we don't plot zero hours leading to zero cost if base repair % is high chartDataPoints.push({ x: h, y: calculatedCost }); } } // Ensure the actual calculated point is included var alreadyIncluded = chartDataPoints.some(function(point){ return point.x === hours.toFixed(1); }); if (!alreadyIncluded && hours > 0) { chartDataPoints.push({ x: hours.toFixed(1), y: cost }); } // Sort points by hours for a clean line chart chartDataPoints.sort(function(a, b) { return a.x – b.x; }); chart = new Chart(ctx, { type: 'line', data: { labels: chartDataPoints.map(function(dp) { return dp.x.toString(); }), // Hours datasets: [{ label: 'Estimated Cost ($)', data: chartDataPoints.map(function(dp) { return dp.y; }), borderColor: 'var(–primary-color)', backgroundColor: 'rgba(0, 74, 153, 0.2)', fill: true, tension: 0.1, pointRadius: 5, pointHoverRadius: 7 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { x: { title: { display: true, text: 'Estimated Labor Hours' } }, y: { title: { display: true, text: 'Estimated Cost ($)' }, beginAtZero: true } }, plugins: { legend: { display: true }, tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || "; if (label) { label += ': '; } if (context.parsed.y !== null) { label += formatCurrency(context.parsed.y); } return label; } } } } } }); } // Initial calculation on load if inputs have default values or are pre-filled document.addEventListener('DOMContentLoaded', function() { // Add event listeners to update results in real-time squareFootageInput.addEventListener('input', calculateCost); layersSelect.addEventListener('change', calculateCost); wallpaperTypeSelect.addEventListener('change', calculateCost); wallConditionSelect.addEventListener('change', calculateCost); laborRateInput.addEventListener('input', calculateCost); // Initial call to set default chart state if needed, or just render it blank resetCalculator(); // Resets and also clears canvas ctx.font = "16px Segoe UI"; ctx.fillStyle = "#777"; ctx.textAlign = "center"; ctx.fillText("Enter inputs and click 'Calculate Cost' to see data.", ctx.canvas.width/2, ctx.canvas.height/2); }); // Chart.js library included via CDN in a real-world scenario, but here we use a placeholder. // In a true production environment, you'd need to include Chart.js library via // For this specific output requirement, we'll assume Chart.js is available globally. // If not, this would require including the library. // For the purpose of this exercise, we'll pretend it's available. // If the output requires pure JS, Chart.js would need to be reimplemented or replaced with SVG/Canvas drawing. // As Chart.js is a common library, we'll proceed assuming its availability. // If Chart.js is not available, the chart rendering will fail. // **Self-correction**: The prompt strictly says "❌ No external chart libraries". I must implement using native Canvas API. // — REIMPLEMENTING CHART WITH NATIVE CANVAS API — function drawChart(hours, cost) { var canvas = document.getElementById('costProjectionChart'); var ctx = canvas.getContext('2d'); ctx.clearRect(0, 0, canvas.width, canvas.height); // Clear previous drawing var padding = 40; var chartWidth = canvas.width – 2 * padding; var chartHeight = canvas.height – 2 * padding; // Sample data points for the line var sampleHours = []; var sampleCosts = []; var maxHours = 0; var maxCost = 0; var baseHours = (parseFloat(squareFootageInput.value) || 200) / 100 * baseRatePer100SqFt; var layersMultiplier = layersMultipliers[layersSelect.value || '1'] || 1.0; var typeMultiplier = typeMultipliers[wallpaperTypeSelect.value || 'paper'] || 1.0; var repairPercent = repairCostPercentages[wallConditionSelect.value || 'good'] || 0.10; var rate = parseFloat(laborRateInput.value) || 50; // Generate a range of hours and calculate corresponding costs var startHour = Math.max(1, baseHours * layersMultiplier * typeMultiplier – 3); var endHour = startHour + 6; // Plot a range of 6 hours for (var h = startHour; h 0) { var currentLaborCost = h * rate; var currentRepairCost = currentLaborCost * repairPercent; var total = currentLaborCost + currentRepairCost; sampleHours.push(h); sampleCosts.push(total); if (h > maxHours) maxHours = h; if (total > maxCost) maxCost = total; } } // Ensure the actual calculated point is within the range or added var currentTotalCost = parseFloat(cost.replace(/[\$,]/g, ")); if (hours > 0 && !sampleHours.includes(hours.toFixed(1))) { sampleHours.push(hours.toFixed(1)); sampleCosts.push(currentTotalCost); if (hours > maxHours) maxHours = hours; if (currentTotalCost > maxCost) maxCost = currentTotalCost; } // Sort points by hours var sortedPoints = []; for(var i=0; i<sampleHours.length; i++){ sortedPoints.push({h: parseFloat(sampleHours[i]), c: sampleCosts[i]}); } sortedPoints.sort(function(a, b){ return a.h – b.h; }); sampleHours = sortedPoints.map(function(p){ return p.h; }); sampleCosts = sortedPoints.map(function(p){ return p.c; }); // Adjust max values slightly for padding maxHours *= 1.1; maxCost *= 1.1; if (maxCost < 50) maxCost = 50; // Minimum cost for better Y-axis scale // Draw Axes ctx.beginPath(); ctx.strokeStyle = '#ccc'; ctx.lineWidth = 1; // Y-axis ctx.moveTo(padding, padding); ctx.lineTo(padding, canvas.height – padding); ctx.stroke(); // X-axis ctx.moveTo(padding, canvas.height – padding); ctx.lineTo(canvas.width – padding, canvas.height – padding); ctx.stroke(); // Draw Labels and Ticks ctx.fillStyle = '#555'; ctx.font = '12px Segoe UI'; ctx.textAlign = 'center'; // Y-axis labels var numYTicks = 5; for (var i = 0; i 0 ? sampleHours.length : 1; // Ensure at least one tick for (var i = 0; i = padding && xPos <= canvas.width – padding) { ctx.fillText(xValue.toFixed(1), xPos, canvas.height – padding + 15); ctx.beginPath(); ctx.moveTo(xPos, canvas.height – padding); ctx.lineTo(xPos, canvas.height – padding + 5); ctx.stroke(); } } // Draw Axis Titles ctx.font = '14px Segoe UI'; ctx.fillText('Estimated Cost ($)', padding / 2, padding / 2); // Y title ctx.fillText('Estimated Labor Hours', canvas.width / 2, canvas.height – padding / 2); // X title // Draw the line graph ctx.beginPath(); ctx.strokeStyle = 'var(–primary-color)'; ctx.lineWidth = 2; ctx.lineJoin = 'round'; ctx.lineCap = 'round'; for (var i = 0; i 0 && currentXPos >= padding && currentXPos 0) { drawChart(currentEstimatedHours, currentTotalCost); } else { // Clear chart if calculation results in zero hours or invalid state var canvas = document.getElementById('costProjectionChart'); var ctx = canvas.getContext('2d'); ctx.clearRect(0, 0, canvas.width, canvas.height); ctx.font = "16px Segoe UI"; ctx.fillStyle = "#777"; ctx.textAlign = "center"; ctx.fillText("Enter inputs and click 'Calculate Cost' to see data.", canvas.width/2, canvas.height/2); } }; var originalResetCalculator = resetCalculator; resetCalculator = function() { originalResetCalculator(); // Canvas is already cleared by resetCalculator, just ensure placeholder text is there if needed var canvas = document.getElementById('costProjectionChart'); var ctx = canvas.getContext('2d'); ctx.clearRect(0, 0, canvas.width, canvas.height); ctx.font = "16px Segoe UI"; ctx.fillStyle = "#777"; ctx.textAlign = "center"; ctx.fillText("Enter inputs and click 'Calculate Cost' to see data.", canvas.width/2, canvas.height/2); }; // Initial chart draw on load document.addEventListener('DOMContentLoaded', function() { // Add event listeners to update results in real-time squareFootageInput.addEventListener('input', calculateCost); layersSelect.addEventListener('change', calculateCost); wallpaperTypeSelect.addEventListener('change', calculateCost); wallConditionSelect.addEventListener('change', calculateCost); laborRateInput.addEventListener('input', calculateCost); resetCalculator(); // Sets initial state including clearing canvas });

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