Car Maintenance Calculator

Car Maintenance Cost Calculator & Estimator :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –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; line-height: 1.6; color: var(–text-color); background-color: var(–background-color); margin: 0; padding: 0; } .container { max-width: 1000px; margin: 20px auto; padding: 20px; background-color: var(–card-background); border-radius: 8px; box-shadow: var(–shadow); } header { text-align: center; padding-bottom: 20px; border-bottom: 1px solid var(–border-color); margin-bottom: 20px; } h1 { color: var(–primary-color); margin-bottom: 10px; font-size: 2.5em; } .summary { font-size: 1.1em; color: #555; margin-bottom: 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: 18px; 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% – 20px); padding: 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: #6c757d; margin-top: 5px; display: block; } .input-group .error-message { color: #dc3545; font-size: 0.85em; margin-top: 5px; display: none; font-weight: bold; } .btn { display: inline-block; padding: 10px 20px; border: none; border-radius: 4px; font-size: 1em; font-weight: bold; cursor: pointer; margin-right: 10px; transition: background-color 0.3s ease; text-decoration: none; color: white; } .btn-primary { background-color: var(–primary-color); } .btn-primary:hover { background-color: #003366; } .btn-success { background-color: var(–success-color); } .btn-success:hover { background-color: #218838; } .btn-reset { background-color: #6c757d; } .btn-reset:hover { background-color: #5a6268; } #results { margin-top: 30px; padding: 25px; background-color: var(–card-background); border-radius: 8px; box-shadow: var(–shadow); text-align: center; } #results h2 { color: var(–primary-color); margin-bottom: 20px; } .result-item { margin-bottom: 15px; font-size: 1.1em; } .result-item strong { color: var(–primary-color); } .main-result { font-size: 1.8em; font-weight: bold; color: var(–success-color); margin: 15px 0; padding: 15px; background-color: #e9f7ef; border-radius: 4px; border: 1px solid #c3e6cb; } .formula-explanation { margin-top: 15px; font-style: italic; color: #555; font-size: 0.95em; } table { width: 100%; border-collapse: collapse; margin-top: 20px; box-shadow: var(–shadow); background-color: var(–card-background); } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid var(–border-color); } thead { background-color: var(–primary-color); color: white; } tbody tr:nth-child(even) { background-color: #f2f2f2; } caption { font-weight: bold; font-size: 1.1em; color: var(–primary-color); margin-bottom: 10px; caption-side: top; text-align: left; } canvas { max-width: 100%; height: auto; margin-top: 20px; background-color: var(–card-background); border-radius: 4px; box-shadow: var(–shadow); } .article-content { margin-top: 40px; background-color: var(–card-background); padding: 30px; border-radius: 8px; box-shadow: var(–shadow); } .article-content h2 { color: var(–primary-color); margin-top: 30px; margin-bottom: 15px; border-bottom: 1px solid var(–border-color); padding-bottom: 5px; } .article-content h3 { color: var(–primary-color); margin-top: 20px; margin-bottom: 10px; } .article-content p { margin-bottom: 15px; } .article-content ul, .article-content ol { margin-bottom: 15px; padding-left: 20px; } .article-content li { margin-bottom: 8px; } .article-content .faq-item { margin-bottom: 15px; } .article-content .faq-item strong { color: var(–primary-color); display: block; margin-bottom: 5px; } .article-content a { color: var(–primary-color); text-decoration: none; font-weight: bold; } .article-content a:hover { text-decoration: underline; } .related-links ul { list-style: none; padding: 0; } .related-links li { margin-bottom: 10px; } .related-links a { display: block; padding: 8px; border-radius: 4px; transition: background-color 0.3s ease; } .related-links a:hover { background-color: #e9ecef; text-decoration: none; } .related-links a strong { color: var(–primary-color); } .related-links span { font-size: 0.9em; color: #555; display: block; margin-top: 4px; }

Car Maintenance Cost Calculator

Effortlessly estimate your future car maintenance expenses and plan your budget effectively. Our tool provides insights into common costs, helping you make informed financial decisions for your vehicle.

Enter the current age of your vehicle in years.
Estimate how many miles or kilometers you drive per year.
Average cost for routine maintenance (oil changes, tires, brakes etc.) per unit of distance.
Set aside an amount annually for unexpected major repairs (engine, transmission).
How many years into the future do you want to project maintenance costs?
Estimated annual increase in maintenance costs due to inflation.

Estimated Maintenance Costs

Total Projected Maintenance Cost:
Estimated Routine Maintenance Cost:
Estimated Major Repair Cost:
Average Annual Maintenance Cost:
Formula: Total Cost = (Annual Mileage * Cost Per Mile * Analysis Period) + (Annual Major Repair Budget * Analysis Period) * (1 + Inflation Rate)^n (for each year n in analysis period)

Annual Maintenance Cost Projection

Projection of routine and major repair costs over the analysis period, including inflation adjustments.

Detailed Annual Maintenance Breakdown

Year Routine Maintenance Cost Major Repair Cost Total Annual Cost
Year-by-year breakdown of projected maintenance and repair costs, adjusted for inflation.

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A car maintenance cost calculator is a digital tool designed to help vehicle owners estimate the potential expenses associated with keeping their car in good working order over a specific period. It takes into account various factors such as the car's age, how much it's driven annually, the expected costs of routine servicing, and an allocation for unexpected major repairs. Essentially, it transforms a complex financial planning task into a simple, data-driven prediction, making it easier for individuals to budget for their vehicle's upkeep. This calculator is an invaluable resource for anyone who owns a car and wants to avoid financial surprises related to its maintenance. It helps answer the crucial question: "How much will my car's maintenance cost me?".

Anyone who owns a car can benefit from using a car maintenance cost calculator. This includes:

  • New Car Buyers: To understand the potential long-term ownership costs beyond the initial purchase price.
  • Used Car Buyers: To assess the potential financial commitment for a vehicle, especially older models.
  • Budget-Conscious Individuals: To proactively set aside funds and avoid depleting savings for car repairs.
  • Fleet Managers: To estimate operational expenses for multiple vehicles.
  • Financial Planners: To incorporate vehicle maintenance into broader financial planning.

A common misconception about car maintenance is that it's a fixed, predictable cost. While routine maintenance like oil changes has a somewhat stable price, unexpected repairs can vary wildly. Another misconception is that newer cars have zero maintenance costs. While they generally require less frequent and less expensive maintenance initially, they are still susceptible to wear and tear, and their repair costs can be significantly higher when issues do arise due to complex technology.

{primary_keyword} Formula and Mathematical Explanation

The core of our car maintenance cost calculator relies on a projection model that combines several key variables to estimate future expenses. It's designed to provide a realistic outlook by considering both scheduled upkeep and the likelihood of unforeseen significant repairs, all while factoring in the erosive effect of inflation over time.

Step-by-Step Calculation:

  1. Calculate Total Routine Maintenance Cost: This is determined by multiplying the annual mileage by the expected maintenance cost per mile and then by the total analysis period.
  2. Calculate Total Major Repair Cost (Nominal): This is simply the annual budget for major repairs multiplied by the analysis period.
  3. Apply Inflation to Major Repairs: Since major repairs are less predictable and potentially more costly in future years, we apply an inflation factor to the major repair budget for each year in the analysis period. This uses a compound growth formula.
  4. Sum for Total Projected Cost: The total projected maintenance cost is the sum of the total routine maintenance cost and the inflation-adjusted total major repair cost over the entire analysis period.
  5. Calculate Average Annual Cost: Divide the total projected cost by the number of years in the analysis period.

Variable Explanations:

Here's a breakdown of the variables used in our car maintenance cost calculator:

Variable Meaning Unit Typical Range
Vehicle Age Current age of the vehicle. Older cars often require more maintenance. Years 0 – 20+
Annual Mileage The total distance driven by the vehicle in a year. More mileage means more wear and tear. Miles/Kilometers 5,000 – 25,000+
Maintenance Cost Per Mile/Km Average cost for routine maintenance items (oil changes, tire rotations, brake pads, fluid top-offs) per unit of distance driven. Currency ($) / Distance Unit $0.03 – $0.10
Annual Major Repair Budget An estimated amount set aside each year specifically for significant, unexpected repairs (e.g., engine, transmission, AC system). Currency ($) $100 – $1000+
Analysis Period The duration (in years) for which the user wants to project maintenance costs. Years 1 – 10
Annual Inflation Rate The projected annual percentage increase in the cost of goods and services, which affects maintenance and repair prices over time. Percentage (%) 1% – 5%

Mathematical Representation:

The calculation can be represented as follows:

Total Routine Cost = Annual Mileage * Maintenance Cost Per Mile * Analysis Period

Total Nominal Major Repair Cost = Annual Major Repair Budget * Analysis Period

The inflation-adjusted major repair cost requires summing up the projected cost for each year:

Total Inflation-Adjusted Major Repair Cost = Σ [Annual Major Repair Budget * (1 + Inflation Rate)^n] for n = 1 to Analysis Period

Total Projected Maintenance Cost = Total Routine Cost + Total Inflation-Adjusted Major Repair Cost

Average Annual Maintenance Cost = Total Projected Maintenance Cost / Analysis Period

Practical Examples (Real-World Use Cases)

Example 1: A 5-Year-Old Commuter Sedan

Scenario: Sarah owns a 5-year-old sedan, drives 12,000 miles annually, and expects routine maintenance to cost about $0.05 per mile. She budgets $200 per year for potential major repairs and wants to project costs over the next 5 years, assuming a 3% annual inflation rate.

  • Vehicle Age: 5 years
  • Annual Mileage: 12,000 miles
  • Maintenance Cost Per Mile: $0.05
  • Annual Major Repair Budget: $200
  • Analysis Period: 5 years
  • Annual Inflation Rate: 3%

Calculation Breakdown:

  • Total Routine Maintenance Cost: 12,000 miles/year * $0.05/mile * 5 years = $3,000
  • Major Repair Costs (inflation-adjusted):
    • Year 1: $200 * (1.03)^1 = $206.00
    • Year 2: $200 * (1.03)^2 = $212.18
    • Year 3: $200 * (1.03)^3 = $218.55
    • Year 4: $200 * (1.03)^4 = $225.10
    • Year 5: $200 * (1.03)^5 = $231.85
    • Total Inflation-Adjusted Major Repair Cost: $1093.68
  • Total Projected Maintenance Cost: $3,000 + $1093.68 = $4,093.68
  • Average Annual Maintenance Cost: $4,093.68 / 5 years = $818.74

Interpretation: Sarah should aim to save approximately $819 per year for the next five years to cover her car's projected maintenance and potential major repair expenses. This proactive approach helps her avoid financial strain when bills arise.

Example 2: An Older, High-Mileage SUV

Scenario: David owns a 10-year-old SUV that he uses for occasional long trips, accumulating 15,000 miles per year. He estimates routine maintenance at $0.08 per mile and sets aside $500 annually for major repairs. He wants to see the potential costs over 3 years with a 4% inflation rate.

  • Vehicle Age: 10 years
  • Annual Mileage: 15,000 miles
  • Maintenance Cost Per Mile: $0.08
  • Annual Major Repair Budget: $500
  • Analysis Period: 3 years
  • Annual Inflation Rate: 4%

Calculation Breakdown:

  • Total Routine Maintenance Cost: 15,000 miles/year * $0.08/mile * 3 years = $3,600
  • Major Repair Costs (inflation-adjusted):
    • Year 1: $500 * (1.04)^1 = $520.00
    • Year 2: $500 * (1.04)^2 = $540.80
    • Year 3: $500 * (1.04)^3 = $562.43
    • Total Inflation-Adjusted Major Repair Cost: $1623.23
  • Total Projected Maintenance Cost: $3,600 + $1623.23 = $5,223.23
  • Average Annual Maintenance Cost: $5,223.23 / 3 years = $1,741.08

Interpretation: David's older SUV, with its higher mileage and age, presents a more significant maintenance cost projection. He should budget around $1,741 annually for the next three years, acknowledging that older vehicles inherently carry a higher risk of costly repairs.

How to Use This Car Maintenance Cost Calculator

Using our car maintenance cost calculator is straightforward. Follow these steps to get your personalized cost estimate:

  1. Input Vehicle Age: Enter the current age of your car in years. Older vehicles generally have higher maintenance needs.
  2. Enter Annual Mileage: Provide an estimate of how many miles (or kilometers) you drive each year. Higher mileage means more frequent servicing and potential wear and tear.
  3. Set Maintenance Cost Per Mile: Input your best estimate for the cost of routine maintenance (like oil changes, tire rotations, brake jobs) per mile driven. Check local service costs or online resources for a reasonable figure.
  4. Estimate Annual Major Repair Budget: Decide on an amount you're comfortable setting aside each year for unexpected, significant repairs (e.g., engine problems, transmission issues). This acts as a buffer.
  5. Specify Analysis Period: Choose how many years into the future you want to project these costs. Common periods are 1, 3, or 5 years.
  6. Enter Inflation Rate: Input the expected annual inflation rate (as a percentage) that will likely increase the cost of parts and labor over time. A typical rate might be 2-4%.
  7. Calculate: Click the "Calculate Costs" button.

Reading Your Results:

  • Total Projected Maintenance Cost: This is the grand total you can expect to spend on both routine servicing and major repairs over your chosen analysis period, factoring in inflation.
  • Estimated Routine Maintenance Cost: The total cost of scheduled upkeep (oil, filters, tires, brakes) over the period.
  • Estimated Major Repair Cost: The total projected cost for significant, unplanned repairs over the period, adjusted for inflation.
  • Average Annual Maintenance Cost: The total projected cost divided by the number of years, giving you a yearly savings target.

The calculator also provides a detailed annual breakdown table and a visual chart projection, allowing you to see how costs might escalate year by year, especially with inflation applied to major repairs.

Decision-Making Guidance:

Use these results to:

  • Create a Sinking Fund: Automatically transfer the 'Average Annual Maintenance Cost' (or a portion of it) into a dedicated savings account each month or year.
  • Evaluate Car Ownership: If projected costs become excessively high, especially for an older vehicle, it might signal that it's time to consider selling the car and purchasing a newer, more reliable model or exploring alternative transportation. Check out our car replacement cost calculator.
  • Negotiate Vehicle Purchases: Understand the potential ongoing costs when comparing different vehicles. A car with lower projected maintenance might be a better long-term investment.
  • Shop for Warranties/Service Plans: Compare the projected costs against the price of extended warranties or pre-paid maintenance plans.

Key Factors That Affect Car Maintenance Cost Results

Several factors significantly influence the accuracy and outcome of any car maintenance cost calculator. Understanding these nuances is crucial for realistic financial planning:

  1. Vehicle Make and Model: Luxury brands and performance vehicles often have higher parts and labor costs compared to economy cars. Specific models might also have known common failure points that increase repair frequency.
  2. Driving Habits: Aggressive driving (hard acceleration and braking) puts more stress on components like brakes, tires, and the transmission, leading to faster wear and tear and potentially higher maintenance costs than smooth, gentle driving.
  3. Maintenance Schedule Adherence: Consistently following the manufacturer's recommended maintenance schedule (e.g., timely oil changes, filter replacements) can prevent minor issues from escalating into major, costly repairs. Neglecting this can significantly increase long-term expenses. Consider using a car service schedule tracker.
  4. Climate and Road Conditions: Vehicles operating in harsh environments (extreme heat or cold, high humidity, salty roads in winter) experience accelerated wear on components like the battery, suspension, and undercarriage. Driving on rough roads also increases wear on tires and suspension systems.
  5. Quality of Parts and Labor: Using cheap, non-OEM (Original Equipment Manufacturer) parts might save money initially but can lead to premature failure and require replacement sooner. Similarly, choosing a less reputable repair shop might result in subpar work, costing more in the long run.
  6. Technological Complexity: Modern cars are packed with advanced technology (sensors, complex electronics, hybrid/electric powertrains). While offering benefits, these systems can be expensive to diagnose and repair when they malfunction, driving up average maintenance costs significantly. This is a key differentiator from older, simpler vehicles.
  7. Fuel Type and Efficiency Considerations: While not directly a maintenance cost, the type of fuel and overall efficiency impacts operational spending. For instance, diesel engines might have different maintenance needs than gasoline engines, and electric vehicles have substantially different (often lower) routine maintenance but potentially high battery replacement costs down the line. This impacts your overall car ownership cost analysis.
  8. Insurance Premiums: While not a direct maintenance cost, comprehensive and collision insurance premiums are influenced by the car's value, age, and the potential cost of repairs. Higher insurance costs are a part of the overall financial picture of car ownership.

Frequently Asked Questions (FAQ)

Q1: Does the car maintenance cost calculator include insurance or fuel costs?

A: No, this calculator specifically focuses on maintenance and repair expenses. Fuel and insurance are separate, significant costs of car ownership. You might need a separate car insurance cost estimator or fuel cost calculator.

Q2: How accurate are the "Maintenance Cost Per Mile" estimates?

A: These are estimates based on averages. Actual costs can vary greatly depending on your specific vehicle, driving style, and local labor rates. It's best to research costs for your particular car model.

Q3: What's the difference between routine maintenance and major repairs?

A: Routine maintenance includes regular servicing like oil changes, tire rotations, filter replacements, and brake pad checks/replacements. Major repairs involve significant, often unexpected, component failures such as engine, transmission, or catalytic converter issues.

Q4: Should I budget more for major repairs on an older car?

A: Yes, absolutely. As cars age and accumulate mileage, the probability of major component failures increases. It's wise to increase your annual major repair budget significantly for vehicles over 7-10 years old.

Q5: How does inflation affect car maintenance costs?

A: Inflation increases the price of parts, labor, and services over time. Our calculator factors this in, particularly for major repairs, showing how costs might rise year over year.

Q6: Can I use this calculator for electric vehicles (EVs)?

A: While the routine maintenance component (like tire wear) is similar, EVs have different major repair considerations (e.g., battery replacement, electric motor issues) and lack traditional engine/transmission components. This calculator is primarily geared towards internal combustion engine vehicles, though the principles can be adapted.

Q7: What if I want to estimate costs for a specific repair, like a timing belt replacement?

A: This calculator provides overall projections. For specific repairs, you'd need to research the average cost for that particular job for your vehicle model and potentially add it to your budget if it's a known upcoming maintenance item.

Q8: How often should I update my inputs in the calculator?

A: It's beneficial to update your inputs annually or whenever significant changes occur, such as a change in your driving habits (more or less mileage), if you purchase a new vehicle, or if you notice a significant shift in local repair costs.

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var validPeriod = validateInput('analysisPeriod', 'analysisPeriodError', 1); var validInflation = validateInput('inflationRate', 'inflationRateError', 0); if (!validAge || !validMileage || !validCostPerMile || !validMajorRepair || !validPeriod || !validInflation) { return; // Stop calculation if any input is invalid } var vehicleAge = parseFloat(document.getElementById('vehicleAge').value); var annualMileage = parseFloat(document.getElementById('annualMileage').value); var maintenanceBudgetPerMile = parseFloat(document.getElementById('maintenanceBudgetPerMile').value); var majorRepairBudgetPerYear = parseFloat(document.getElementById('majorRepairBudgetPerYear').value); var analysisPeriod = parseInt(document.getElementById('analysisPeriod').value); var inflationRate = parseFloat(document.getElementById('inflationRate').value) / 100; // Convert percentage to decimal var totalRoutineCost = annualMileage * maintenanceBudgetPerMile * analysisPeriod; var totalInflationAdjustedMajorRepairCost = 0; var annualBreakdown = []; for (var i = 1; i <= analysisPeriod; i++) { var currentYearMajorRepairCost = majorRepairBudgetPerYear * Math.pow(1 + inflationRate, i); totalInflationAdjustedMajorRepairCost += currentYearMajorRepairCost; annualBreakdown.push({ year: i, routine: annualMileage * maintenanceBudgetPerMile, major: currentYearMajorRepairCost, total: (annualMileage * maintenanceBudgetPerMile) + currentYearMajorRepairCost }); } var totalProjectedCost = totalRoutineCost + totalInflationAdjustedMajorRepairCost; var averageAnnualCost = totalProjectedCost / analysisPeriod; document.getElementById('routineCost').textContent = '$' + totalRoutineCost.toFixed(2); document.getElementById('majorRepairCost').textContent = '$' + totalInflationAdjustedMajorRepairCost.toFixed(2); document.getElementById('totalCost').textContent = '$' + totalProjectedCost.toFixed(2); document.getElementById('averageAnnualCost').textContent = '$' + averageAnnualCost.toFixed(2); // Update chart and table updateChart(annualBreakdown); updateTable(annualBreakdown); } function updateTable(annualBreakdown) { var tableBody = document.getElementById('maintenanceDetailsTable').getElementsByTagName('tbody')[0]; tableBody.innerHTML = ''; // Clear previous rows for (var i = 0; i < annualBreakdown.length; i++) { var row = tableBody.insertRow(); var breakdown = annualBreakdown[i]; var cellYear = row.insertCell(0); var cellRoutine = row.insertCell(1); var cellMajor = row.insertCell(2); var cellTotal = row.insertCell(3); cellYear.textContent = breakdown.year; cellRoutine.textContent = '$' + breakdown.routine.toFixed(2); cellMajor.textContent = '$' + breakdown.major.toFixed(2); cellTotal.textContent = '$' + breakdown.total.toFixed(2); } document.getElementById('maintenanceDetailsTableContainer').style.display = 'block'; } var maintenanceChartInstance = null; // Store chart instance function updateChart(annualBreakdown) { var ctx = document.getElementById('maintenanceChart').getContext('2d'); // Destroy previous chart instance if it exists if (maintenanceChartInstance) { maintenanceChartInstance.destroy(); } var labels = annualBreakdown.map(function(item) { return 'Year ' + item.year; }); var routineData = annualBreakdown.map(function(item) { return item.routine; }); var majorData = annualBreakdown.map(function(item) { return item.major; }); maintenanceChartInstance = new Chart(ctx, { type: 'bar', // Use bar chart for annual comparison data: { labels: labels, datasets: [ { label: 'Routine Maintenance Cost', data: routineData, backgroundColor: 'rgba(0, 74, 153, 0.6)', // Primary color borderColor: 'rgba(0, 74, 153, 1)', borderWidth: 1 }, { label: 'Major Repair Cost (Inflation Adjusted)', data: majorData, backgroundColor: 'rgba(40, 167, 69, 0.6)', // Success color borderColor: 'rgba(40, 167, 69, 1)', borderWidth: 1 } ] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, ticks: { callback: function(value) { return '$' + value.toFixed(0); } } } }, plugins: { tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || ''; if (label) { label += ': '; } if (context.parsed.y !== null) { label += new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(context.parsed.y); } return label; } } } } } }); document.getElementById('maintenanceChartContainer').style.display = 'block'; } function resetCalculator() { document.getElementById('vehicleAge').value = '5'; document.getElementById('annualMileage').value = '12000'; document.getElementById('maintenanceBudgetPerMile').value = '0.05'; document.getElementById('majorRepairBudgetPerYear').value = '200'; document.getElementById('analysisPeriod').value = '5'; document.getElementById('inflationRate').value = '3'; // Clear errors document.getElementById('vehicleAgeError').style.display = 'none'; document.getElementById('annualMileageError').style.display = 'none'; document.getElementById('maintenanceBudgetPerMileError').style.display = 'none'; document.getElementById('majorRepairBudgetPerYearError').style.display = 'none'; document.getElementById('analysisPeriodError').style.display = 'none'; document.getElementById('inflationRateError').style.display = 'none'; // Clear results document.getElementById('routineCost').textContent = '–'; document.getElementById('majorRepairCost').textContent = '–'; document.getElementById('totalCost').textContent = '–'; document.getElementById('averageAnnualCost').textContent = '–'; // Hide chart and table document.getElementById('maintenanceChartContainer').style.display = 'none'; document.getElementById('maintenanceDetailsTableContainer').style.display = 'none'; if (maintenanceChartInstance) { maintenanceChartInstance.destroy(); maintenanceChartInstance = null; } } function copyResults() { var routineCost = document.getElementById('routineCost').textContent; var majorRepairCost = document.getElementById('majorRepairCost').textContent; var totalCost = document.getElementById('totalCost').textContent; var averageAnnualCost = document.getElementById('averageAnnualCost').textContent; var vehicleAge = document.getElementById('vehicleAge').value; var annualMileage = document.getElementById('annualMileage').value; var maintenanceBudgetPerMile = document.getElementById('maintenanceBudgetPerMile').value; var majorRepairBudgetPerYear = document.getElementById('majorRepairBudgetPerYear').value; var analysisPeriod = document.getElementById('analysisPeriod').value; var inflationRate = document.getElementById('inflationRate').value; var assumptions = `Key Assumptions:\n` + `- Vehicle Age: ${vehicleAge} years\n` + `- Annual Mileage: ${annualMileage} miles/km\n` + `- Maintenance Cost Per Mile/Km: $${maintenanceBudgetPerMile}\n` + `- Annual Budget for Major Repairs: $${majorRepairBudgetPerYear}\n` + `- Analysis Period: ${analysisPeriod} years\n` + `- Annual Inflation Rate: ${inflationRate}%\n`; var resultsText = `Estimated Maintenance Costs:\n` + `Total Projected Maintenance Cost: ${totalCost}\n` + `Estimated Routine Maintenance Cost: ${routineCost}\n` + `Estimated Major Repair Cost: ${majorRepairCost}\n` + `Average Annual Maintenance Cost: ${averageAnnualCost}\n\n` + `${assumptions}`; // Use a temporary textarea to copy to clipboard var textArea = document.createElement("textarea"); textArea.value = resultsText; textArea.style.position = "fixed"; textArea.style.opacity = 0; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied successfully!' : 'Failed to copy results.'; alert(msg); } catch (err) { alert('Oops, unable to copy using execCommand: ' + err); } document.body.removeChild(textArea); } // Add Chart.js library reference if not already included // For a single HTML file, it's best to include it directly or via CDN // Example using CDN (ensure internet connection): var script = document.createElement('script'); script.src = 'https://cdn.jsdelivr.net/npm/chart.js@3.9.1/dist/chart.min.js'; script.onload = function() { // Initial calculation on load if inputs have default values calculateMaintenance(); }; document.head.appendChild(script); // Initial calculation after Chart.js is loaded // Alternatively, you can call calculateMaintenance() directly after the script tag // if you ensure the script is loaded before the function is called. // For simplicity in a single file, we call it in the script's onload.

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