Honda Calculator

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Honda Maintenance Cost Calculator

Estimate the long-term maintenance and running costs for your Honda vehicle. Understand your potential expenses over time by inputting key details about your car and driving habits.

Honda Running Cost Estimator

Enter the following details to estimate your Honda's maintenance and running costs over a specified period.

Civic Accord CR-V HR-V Pilot Odyssey Insight Other (Average)
Select your Honda model for more specific cost estimates.
The initial price you paid for the vehicle.
The total miles driven so far.
Average miles you drive each year.
How long you plan to own or have owned the vehicle.
Gasoline Hybrid Electric
Select the fuel type of your Honda.
Current average price for gasoline, electricity, etc.

Estimated Running Costs

Total Estimated Cost: $0.00
Formula Used: Total Cost = (Scheduled Maintenance + Unscheduled Repairs + Fuel Costs + Insurance + Depreciation) over Ownership Period. Costs are averaged based on model, mileage, and typical service intervals.
Scheduled Maintenance
Unscheduled Repairs
Fuel Costs
Depreciation

Cost Breakdown Over Time

Visualizing estimated annual costs (Maintenance, Fuel, Depreciation).
Typical Maintenance Intervals and Estimated Costs
Service Type Interval (Miles) Estimated Cost Model Relevance

What is the Honda Running Cost Calculator?

The Honda running cost calculator is a sophisticated online tool designed to help current and prospective Honda owners estimate the total expenses associated with owning and operating their vehicle over a chosen period. Unlike a simple car payment calculator, this tool delves into the ongoing expenditures beyond the initial purchase and financing. It accounts for essential running costs such as scheduled maintenance, potential unscheduled repairs, fuel consumption, insurance premiums, and the inevitable depreciation of the vehicle's value. By providing a comprehensive overview, the Honda running cost calculator empowers users to budget more effectively, make informed decisions about vehicle ownership, and compare the long-term affordability of different Honda models.

This calculator is particularly useful for individuals planning to purchase a new or used Honda, existing owners looking to understand their vehicle's financial impact, or fleet managers assessing operational costs. It helps demystify the often-overlooked expenses that contribute to the total cost of ownership. A common misconception is that once the car is paid off, the costs significantly decrease; however, maintenance, repairs, and depreciation continue to be major factors. This Honda running cost calculator aims to provide a realistic financial picture, allowing for better long-term financial planning.

Honda Running Cost Formula and Mathematical Explanation

The core of the Honda running cost calculator relies on a multi-faceted formula that aggregates various cost components over the specified ownership duration. While precise figures vary significantly based on numerous factors, the general formula can be represented as:

Total Estimated Cost = (A + B + C + D + E) * F

Where:

  • A = Total Scheduled Maintenance Costs
  • B = Estimated Unscheduled Repair Costs
  • C = Total Fuel Costs
  • D = Estimated Insurance Costs
  • E = Estimated Depreciation Value
  • F = Ownership Period Factor (adjusts for time/mileage progression)

Variable Explanations and Typical Ranges

Variable Meaning Unit Typical Range / Notes
Model Type Factor A multiplier reflecting typical maintenance and repair costs for specific Honda models (e.g., Civic vs. Pilot). Multiplier 0.8 (e.g., efficient models) to 1.5 (e.g., larger SUVs/trucks)
Purchase Price Initial cost of the vehicle. USD ($) $15,000 – $50,000+
Current Mileage Odometer reading at the start of the estimation. Miles 0 – 300,000+
Annual Mileage Average miles driven per year. Miles/Year 5,000 – 25,000+
Ownership Years Duration for which costs are estimated. Years 1 – 15+
Fuel Type Type of fuel the vehicle uses (Gasoline, Hybrid, Electric). Categorical Gasoline, Hybrid, Electric
Avg Fuel Price Average cost of fuel per unit (gallon or kWh). USD ($) $2.00 – $6.00+
Scheduled Maintenance Cost/Mile Average cost for routine services (oil changes, filters, etc.) per mile. $/Mile $0.03 – $0.10 (varies by model/service needs)
Unscheduled Repair Cost Factor Multiplier for expected costs of non-routine repairs (e.g., transmission, engine issues). Multiplier 0.01 – 0.05 (of vehicle value, increases with age/mileage)
Insurance Cost Factor Percentage of vehicle value attributable to annual insurance. % of Value/Year 2% – 8% (varies by driver, location, model)
Depreciation Rate Annual percentage loss in vehicle value. %/Year 5% – 20% (higher in early years)

Practical Examples (Real-World Use Cases)

Let's explore two practical scenarios using the Honda running cost calculator:

Example 1: The Daily Commuter – Honda Civic

Scenario: Sarah owns a 2020 Honda Civic LX. She bought it new for $22,000. She drives 15,000 miles annually and has driven 45,000 miles so far. She plans to keep it for another 4 years (total ownership of 7 years). Her current average fuel price is $3.60/gallon.

Inputs:

  • Model: Civic
  • Purchase Price: $22,000
  • Current Mileage: 45,000 miles
  • Annual Mileage: 15,000 miles/year
  • Ownership Years: 4 years
  • Fuel Type: Gasoline
  • Average Fuel Price: $3.60

Estimated Outputs (Illustrative):

  • Total Estimated Cost (4 years): $15,800
  • Scheduled Maintenance: ~$2,100
  • Unscheduled Repairs: ~$1,500
  • Fuel Costs: ~$7,200
  • Depreciation: ~$5,000

Interpretation: Over the next four years, Sarah can expect to spend approximately $15,800 on her Civic. Fuel is the largest component, followed by depreciation. This estimate helps her budget for these expenses and confirm if the Civic remains a cost-effective choice for her needs.

Example 2: The Family Hauler – Honda CR-V

Scenario: The Miller family has a 2018 Honda CR-V EX-L purchased used for $20,000 with 50,000 miles. They drive 10,000 miles annually and want to estimate costs for the next 5 years. Their average fuel price is $3.80/gallon.

Inputs:

  • Model: CR-V
  • Purchase Price: $20,000
  • Current Mileage: 50,000 miles
  • Annual Mileage: 10,000 miles/year
  • Ownership Years: 5 years
  • Fuel Type: Gasoline
  • Average Fuel Price: $3.80

Estimated Outputs (Illustrative):

  • Total Estimated Cost (5 years): $18,500
  • Scheduled Maintenance: ~$2,800
  • Unscheduled Repairs: ~$2,500
  • Fuel Costs: ~$7,600
  • Depreciation: ~$5,600

Interpretation: For the Millers, the CR-V represents an estimated cost of $18,500 over five years. While fuel costs are substantial, unscheduled repairs and depreciation are also significant factors for an older vehicle. This estimation aids their family budget and long-term vehicle planning, potentially influencing future purchase decisions or maintenance strategies.

How to Use This Honda Running Cost Calculator

Using the Honda running cost calculator is straightforward. Follow these steps to get your personalized cost estimate:

  1. Select Your Model: Choose your specific Honda model from the dropdown list. If your model isn't listed, select 'Other' for an average estimate.
  2. Enter Purchase Price: Input the original price you paid for the vehicle. For used vehicles, use the price you paid.
  3. Input Current Mileage: Enter the current mileage shown on your odometer.
  4. Specify Annual Mileage: Enter the average number of miles you drive per year.
  5. Set Ownership Duration: Indicate the number of years you plan to own the vehicle (or have owned it) for the estimation.
  6. Choose Fuel Type: Select whether your vehicle runs on gasoline, is a hybrid, or is fully electric.
  7. Enter Average Fuel Price: Input the current average price you pay for fuel per gallon or per kWh for electric vehicles.
  8. Click 'Calculate Costs': Press the button to generate your estimated running costs.

Reading the Results:

  • Primary Result: The main figure shows the total estimated cost over your specified ownership period.
  • Intermediate Values: You'll see breakdowns for Scheduled Maintenance, Unscheduled Repairs, Fuel Costs, and Depreciation, providing insight into where the money goes.
  • Maintenance Table: This table lists common service items, their typical mileage intervals, estimated costs, and how they relate to different models.
  • Chart: The visual chart illustrates how these costs might distribute annually, helping you anticipate expenses.

Decision-Making Guidance: Use these estimates to compare the long-term affordability of different Honda models, budget for upcoming expenses, or decide when it might be financially sensible to upgrade your vehicle. Remember, these are estimates; actual costs can vary.

Key Factors That Affect Honda Running Cost Results

Several critical factors significantly influence the accuracy of the Honda running cost calculator's estimates. Understanding these can help you refine your expectations:

  1. Model Specifics & Trim Level: Different Honda models (e.g., Civic vs. Pilot) and even trim levels within a model have varying maintenance requirements, component costs, and fuel efficiency, directly impacting repair and fuel expenses. Luxury trims might have more complex systems prone to higher repair costs.
  2. Driving Habits & Conditions: Aggressive driving, frequent short trips, or driving in harsh conditions (extreme temperatures, stop-and-go traffic, rough roads) accelerate wear and tear on components like brakes, tires, and the engine, leading to higher maintenance and repair costs than gentle highway driving.
  3. Maintenance Adherence: Consistently following Honda's recommended maintenance schedule (oil changes, fluid flushes, filter replacements) can prevent minor issues from becoming major, costly repairs. Neglecting maintenance often leads to significantly higher unscheduled repair bills later on. This is a key aspect of responsible Honda vehicle care.
  4. Vehicle Age & Mileage: As vehicles age and accumulate mileage, components naturally wear out. This increases the likelihood of unscheduled repairs (e.g., exhaust systems, suspension, transmission issues) and often leads to higher depreciation in the initial years, followed by a slower rate as the car ages further.
  5. Fuel Prices & Type: Fluctuations in gasoline prices directly impact fuel costs. For electric Hondas, the price of electricity (per kWh) is the determining factor. Fuel efficiency (MPG or MPGe) also plays a crucial role; a more efficient vehicle will have lower fuel expenses.
  6. Insurance Premiums: Insurance costs vary based on driver history, location, coverage levels, and the specific Honda model's safety ratings and repair costs. Higher-value or more frequently stolen models typically incur higher insurance premiums. Consider a Honda insurance guide for more details.
  7. Geographic Location: Costs for parts, labor, and even fuel can differ significantly depending on your region. Major metropolitan areas might have higher labor costs, while rural areas might have fewer specialized repair shops, potentially leading to longer repair times or travel costs.
  8. Unexpected Events: Accidents, severe weather damage, or unforeseen mechanical failures outside of normal wear and tear can lead to substantial repair bills that are difficult to predict precisely. While the calculator includes an estimate for unscheduled repairs, major incidents can exceed these projections. Proper Honda collision repair information can be vital.

Frequently Asked Questions (FAQ)

What is considered "Scheduled Maintenance" for a Honda?
Scheduled maintenance includes routine services recommended by Honda at specific mileage or time intervals. Common examples include oil and filter changes, tire rotations, brake inspections, cabin air filter replacements, spark plug changes, and transmission fluid flushes. The exact schedule varies by model and year. Consult your owner's manual for specifics.
How accurate are the "Unscheduled Repair" estimates?
Unscheduled repair estimates are based on average industry data and typical failure rates for specific Honda models and their age/mileage. They aim to cover common issues like starter failures, alternator replacements, or minor transmission problems. However, major, unexpected failures can significantly exceed these estimates. Proper Honda repair cost guides can offer more context.
Does the calculator include financing costs (loan interest)?
No, this Honda running cost calculator focuses exclusively on the operational expenses after the vehicle has been purchased. It does not include the initial purchase price itself, nor does it factor in loan interest, down payments, or leasing costs.
How does fuel type affect the running costs?
Fuel type is critical. Electric vehicles (EVs) typically have lower "fuel" costs (electricity vs. gasoline) and potentially lower maintenance costs (fewer moving parts). Hybrids offer a balance, improving fuel efficiency over gasoline counterparts. The calculator uses your input for average fuel price and vehicle type to estimate these differences. For example, understanding Honda electric vehicle charging costs is important.
What is depreciation and why is it included?
Depreciation is the loss of a vehicle's value over time due to age, mileage, and market demand. It's an "opportunity cost" – the money you won't get back when you sell or trade in the car. Including it provides a more complete picture of the total cost of ownership, as it represents a real financial loss.
Can I use this calculator for older or high-mileage Hondas?
Yes, you can. However, for very old or high-mileage vehicles, the estimated unscheduled repair costs and maintenance expenses will likely be higher. Depreciation will also slow down significantly for older models. Always cross-reference with local mechanic estimates for the most accurate repair costs. Check out our used Honda inspection checklist.
Does the calculator account for tires, brakes, and other consumables?
Costs for consumables like tires, brake pads, and wiper blades are generally factored into both scheduled maintenance (if replaced at intervals) and are implicitly included within the estimates for unscheduled repairs, especially as the vehicle ages. They are a common part of routine upkeep.
Are taxes and registration fees included in the estimate?
No, this calculator does not include taxes, title, license, or registration fees. These are government-mandated costs that vary widely by location and are typically paid annually or at the time of purchase/transfer.

© 2023 Honda Cost Calculator. All rights reserved.

// Chart Instance Variable var costBreakdownChartInstance = null; // Default Values var defaultValues = { model: 'civic', purchasePrice: 25000, currentMileage: 30000, annualMileage: 12000, ownershipYears: 5, fuelType: 'gasoline', avgFuelPrice: 3.50 }; // Model-specific factors for cost estimations var modelFactors = { civic: { baseCostPerMile: 0.05, repairFactor: 0.02, depreciationRate: 0.12, fuelEff: 32 }, accord: { baseCostPerMile: 0.06, repairFactor: 0.025, depreciationRate: 0.13, fuelEff: 30 }, crv: { baseCostPerMile: 0.07, repairFactor: 0.03, depreciationRate: 0.14, fuelEff: 28 }, hrv: { baseCostPerMile: 0.06, repairFactor: 0.028, depreciationRate: 0.13, fuelEff: 31 }, pilot: { baseCostPerMile: 0.09, repairFactor: 0.04, depreciationRate: 0.15, fuelEff: 22 }, odyssey: { baseCostPerMile: 0.08, repairFactor: 0.035, depreciationRate: 0.14, fuelEff: 20 }, insight: { baseCostPerMile: 0.04, repairFactor: 0.015, depreciationRate: 0.11, fuelEff: 52 }, other: { baseCostPerMile: 0.06, repairFactor: 0.03, depreciationRate: 0.13, fuelEff: 29 } }; // Fuel efficiency for electric/hybrid (simplified) var evHybridFuelEff = { hybrid: 50, // Effective MPG equivalent electric: 100 // Effective MPGe equivalent (miles per 33.7 kWh) }; // Maintenance intervals and costs (simplified examples) var maintenanceData = [ { service: "Oil Change & Filter", interval: 7500, cost: 75, models: ["civic", "accord", "crv", "hrv", "insight", "other"], modelEff: [1.0, 1.1, 1.2, 1.15, 1.0, 1.05] }, { service: "Tire Rotation", interval: 7500, cost: 30, models: ["civic", "accord", "crv", "hrv", "pilot", "odyssey", "insight", "other"], modelEff: [1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0] }, { service: "Brake Inspection", interval: 15000, cost: 50, models: ["civic", "accord", "crv", "hrv", "pilot", "odyssey", "insight", "other"], modelEff: [1.0, 1.0, 1.1, 1.1, 1.2, 1.2, 0.9, 1.0] }, { service: "Engine Air Filter", interval: 30000, cost: 60, models: ["civic", "accord", "crv", "hrv", "pilot", "odyssey", "insight", "other"], modelEff: [1.0, 1.0, 1.1, 1.1, 1.2, 1.2, 0.9, 1.0] }, { service: "Cabin Air Filter", interval: 30000, cost: 70, models: ["civic", "accord", "crv", "hrv", "pilot", "odyssey", "insight", "other"], modelEff: [1.0, 1.0, 1.1, 1.1, 1.2, 1.2, 0.9, 1.0] }, { service: "Spark Plugs", interval: 100000, cost: 300, models: ["civic", "accord", "crv", "pilot", "odyssey", "other"], modelEff: [1.0, 1.1, 1.2, 1.5, 1.5, 1.1] }, { service: "Transmission Fluid", interval: 60000, cost: 200, models: ["civic", "accord", "crv", "pilot", "odyssey", "other"], modelEff: [1.0, 1.1, 1.2, 1.5, 1.6, 1.1] }, { service: "Coolant Flush", interval: 100000, cost: 150, models: ["civic", "accord", "crv", "pilot", "odyssey", "other"], modelEff: [1.0, 1.1, 1.2, 1.5, 1.5, 1.1] } ]; function getModelFactor(model, property) { return modelFactors[model] ? modelFactors[model][property] : modelFactors['other'][property]; } function getModelLabel(model) { var select = document.getElementById('model'); for (var i = 0; i < select.options.length; i++) { if (select.options[i].value === model) { return select.options[i].text; } } return 'Other'; } function validateInput(id, errorId, min, max) { var input = document.getElementById(id); var errorElement = document.getElementById(errorId); var value = parseFloat(input.value); var isValid = true; errorElement.innerText = ''; errorElement.classList.remove('visible'); input.style.borderColor = '#dee2e6'; // Reset border color if (input.value.trim() === '') { errorElement.innerText = 'This field cannot be empty.'; isValid = false; } else if (isNaN(value)) { errorElement.innerText = 'Please enter a valid number.'; isValid = false; } else { if (min !== undefined && value max) { errorElement.innerText = 'Value cannot exceed ' + max + '.'; isValid = false; } } if (!isValid) { errorElement.classList.add('visible'); input.style.borderColor = '#dc3545'; } return isValid; } function calculateCosts() { var model = document.getElementById('model').value; var purchasePrice = parseFloat(document.getElementById('purchasePrice').value); var currentMileage = parseFloat(document.getElementById('currentMileage').value); var annualMileage = parseFloat(document.getElementById('annualMileage').value); var ownershipYears = parseFloat(document.getElementById('ownershipYears').value); var fuelType = document.getElementById('fuelType').value; var avgFuelPrice = parseFloat(document.getElementById('avgFuelPrice').value); // — Validation — var allValid = true; allValid &= validateInput('purchasePrice', 'purchasePriceError', 0); allValid &= validateInput('currentMileage', 'currentMileageError', 0); allValid &= validateInput('annualMileage', 'annualMileageError', 0); allValid &= validateInput('ownershipYears', 'ownershipYearsError', 1); // Min 1 year allValid &= validateInput('avgFuelPrice', 'avgFuelPriceError', 0); if (!allValid) { document.getElementById('primary-result').innerText = 'Please correct errors'; // Clear intermediate results if validation fails document.getElementById('scheduledMaintenance').innerText = '–'; document.getElementById('unscheduledRepairs').innerText = '–'; document.getElementById('fuelCosts').innerText = '–'; document.getElementById('depreciation').innerText = '–'; return; } // — Calculations — var modelFactor = getModelFactor(model, 'baseCostPerMile'); var repairFactor = getModelFactor(model, 'repairFactor'); var depreciationRate = getModelFactor(model, 'depreciationRate'); var fuelEff = modelFactors[model] ? modelFactors[model].fuelEff : modelFactors['other'].fuelEff; if (fuelType === 'hybrid') { fuelEff = evHybridFuelEff.hybrid; // Use hybrid effective MPG } else if (fuelType === 'electric') { fuelEff = evHybridFuelEff.electric; // Use electric effective MPGe } var totalMilesDriven = currentMileage + (annualMileage * ownershipYears); var ownershipPeriodMiles = annualMileage * ownershipYears; // Scheduled Maintenance Cost var totalScheduledMaintenance = 0; var numServices = 0; for (var i = 0; i 0) { totalScheduledMaintenance += intervalsInPeriod * serviceCost; numServices += intervalsInPeriod; // Count total services for avg calc later if needed } else { // Check if the first service interval falls within the ownership period if (service.interval > (currentMileage % service.interval) && service.interval <= (currentMileage % service.interval) + ownershipPeriodMiles) { if (currentMileage < service.interval ) { // Only add if not already passed on first service totalScheduledMaintenance += serviceCost; numServices += 1; } } } } // Add cost for services that might occur once during the ownership period even if intervals aren't met exactly multiple times for (var i = 0; i < maintenanceData.length; i++) { var service = maintenanceData[i]; var modelIndex = service.models.indexOf(model); if (modelIndex === -1) continue; var serviceCost = service.cost; if (modelIndex !== -1 && service.modelEff && service.modelEff[modelIndex]) { serviceCost = service.cost * service.modelEff[modelIndex]; } // Check if the first service interval is within the ownership period from current mileage if (currentMileage = service.interval) { // Check if we already counted this service from the floor(intervalsInPeriod) calculation var alreadyCounted = Math.floor(ownershipPeriodMiles / service.interval) > 0; if (!alreadyCounted) { totalScheduledMaintenance += serviceCost; numServices += 1; } } } // Unscheduled Repairs Cost // Simplified: percentage of purchase price, adjusted by age/mileage and repair factor var estimatedVehicleValue = purchasePrice * Math.pow((1 – depreciationRate), ownershipYears); // Rough estimate of value at end of period var unscheduledRepairsEstimate = (purchasePrice * repairFactor * (currentMileage / 100000)) * ownershipYears; // Mileage-based factor unscheduledRepairsEstimate += (purchasePrice * repairFactor * 0.5) * (ownershipYears / 5); // Age-based factor // Fuel Costs var gallonsPerMile = 1 / fuelEff; var avgFuelCostPerMile = gallonsPerMile * avgFuelPrice; var totalFuelCosts = avgFuelCostPerMile * ownershipPeriodMiles; if (fuelType === 'electric') { // Simplified: Assume 33.7 kWh per 100 miles for EVs (approx 100 MPGe) var kwhPerMile = 33.7 / 100; totalFuelCosts = kwhPerMile * ownershipPeriodMiles * avgFuelPrice; // avgFuelPrice is $/kWh here } // Depreciation Cost var initialDepreciation = purchasePrice * depreciationRate; var totalDepreciation = purchasePrice * (1 – Math.pow(1 – depreciationRate, ownershipYears)); // Total Estimated Cost var totalCost = totalScheduledMaintenance + unscheduledRepairsEstimate + totalFuelCosts + (purchasePrice * getModelFactor(model, 'insuranceRate') * ownershipYears) + totalDepreciation; // Simplified insurance rate // — Display Results — document.getElementById('primary-result').innerText = '$' + totalCost.toFixed(2); document.getElementById('scheduledMaintenance').innerText = '$' + totalScheduledMaintenance.toFixed(2); document.getElementById('unscheduledRepairs').innerText = '$' + unscheduledRepairsEstimate.toFixed(2); document.getElementById('fuelCosts').innerText = '$' + totalFuelCosts.toFixed(2); document.getElementById('depreciation').innerText = '$' + totalDepreciation.toFixed(2); // — Update Chart — updateChart(ownershipYears, annualMileage, totalScheduledMaintenance, unscheduledRepairsEstimate, totalFuelCosts, totalDepreciation, model, ownershipPeriodMiles); updateMaintenanceTable(); } function updateMaintenanceTable() { var model = document.getElementById('model').value; var currentMileage = parseFloat(document.getElementById('currentMileage').value); var ownershipYears = parseFloat(document.getElementById('ownershipYears').value); var annualMileage = parseFloat(document.getElementById('annualMileage').value); var ownershipPeriodMiles = annualMileage * ownershipYears; var tableBody = document.getElementById('maintenanceTableBody'); tableBody.innerHTML = "; // Clear existing rows var displayedServices = {}; // To avoid duplicate entries for same service type maintenanceData.forEach(function(service) { var modelIndex = service.models.indexOf(model); if (modelIndex === -1) return; // Skip if model not relevant var serviceCost = service.cost; if (service.modelEff && service.modelEff[modelIndex]) { serviceCost = service.cost * service.modelEff[modelIndex]; } var relevantService = false; var intervalsInPeriod = 0; var firstIntervalMile = -1; // Check if the first service falls within the ownership period if (service.interval > (currentMileage % service.interval) && service.interval <= (currentMileage % service.interval) + ownershipPeriodMiles) { if (currentMileage 0) { relevantService = true; } if (relevantService) { var row = tableBody.insertRow(); var cellService = row.insertCell(0); var cellInterval = row.insertCell(1); var cellCost = row.insertCell(2); var cellModelRel = row.insertCell(3); cellService.innerText = service.service; cellInterval.innerText = service.interval + " miles"; cellCost.innerText = "$" + serviceCost.toFixed(2); cellModelRel.innerText = getModelLabel(model); // Add a note if it's the first instance within the period if(firstIntervalMile !== -1 && intervalsInPeriod === 0) { cellInterval.innerText += " (First)"; } else if (intervalsInPeriod > 0) { cellInterval.innerText += " (" + (intervalsInPeriod + (firstIntervalMile !== -1 ? 1 : 0)) + " times)"; } } }); } function updateChart(ownershipYears, annualMileage, scheduledMaint, unscheduledRepairs, fuelCosts, depreciation, model, ownershipPeriodMiles) { var ctx = document.getElementById('costBreakdownChart').getContext('2d'); // Calculate annual costs var years = []; var annualScheduledMaint = []; var annualFuelCosts = []; var annualDepreciation = []; var annualRepairs = []; var annualTotal = []; var avgFuelPrice = parseFloat(document.getElementById('avgFuelPrice').value); var fuelType = document.getElementById('fuelType').value; var fuelEff = modelFactors[model] ? modelFactors[model].fuelEff : modelFactors['other'].fuelEff; if (fuelType === 'hybrid') { fuelEff = evHybridFuelEff.hybrid; } else if (fuelType === 'electric') { fuelEff = evHybridFuelEff.electric; } var avgFuelCostPerMile = fuelType === 'electric' ? (33.7 / 100) * avgFuelPrice : (1 / fuelEff) * avgFuelPrice; var depreciationRate = getModelFactor(model, 'depreciationRate'); for (var i = 1; i <= ownershipYears; i++) { years.push('Year ' + i); var currentYearMileage = annualMileage; // Assuming constant annual mileage for simplicity in chart var currentYearFuelCost = avgFuelCostPerMile * currentYearMileage; // Simplified: Distribute scheduled maintenance and repairs somewhat evenly, // but acknowledge potential increase with age/mileage. Depreciation is highest early on. var maintForYear = scheduledMaint / ownershipYears; // Distribute evenly for chart simplicity var repairForYear = unscheduledRepairs / ownershipYears; // Distribute evenly for chart simplicity var depreciationForYear = (purchasePrice * (1 – Math.pow(1 – depreciationRate, i))) – (purchasePrice * (1 – Math.pow(1 – depreciationRate, i – 1))); // Calculate depreciation for this specific year annualScheduledMaint.push(maintForYear); annualFuelCosts.push(currentYearFuelCost); annualDepreciation.push(depreciationForYear); annualRepairs.push(repairForYear); annualTotal.push(maintForYear + currentYearFuelCost + depreciationForYear + repairForYear); } // Destroy previous chart instance if it exists if (costBreakdownChartInstance) { costBreakdownChartInstance.destroy(); } costBreakdownChartInstance = new Chart(ctx, { type: 'bar', // Changed to bar chart for better comparison data: { labels: years, datasets: [{ label: 'Scheduled Maintenance', data: annualScheduledMaint, backgroundColor: 'rgba(54, 162, 235, 0.6)', borderColor: 'rgba(54, 162, 235, 1)', borderWidth: 1 }, { label: 'Fuel Costs', data: annualFuelCosts, backgroundColor: 'rgba(255, 99, 132, 0.6)', borderColor: 'rgba(255, 99, 132, 1)', borderWidth: 1 }, { label: 'Depreciation', data: annualDepreciation, backgroundColor: 'rgba(255, 206, 86, 0.6)', borderColor: 'rgba(255, 206, 86, 1)', borderWidth: 1 }, { label: 'Unscheduled Repairs', data: annualRepairs, backgroundColor: 'rgba(75, 192, 192, 0.6)', borderColor: 'rgba(75, 192, 192, 1)', borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Estimated Cost ($)' } }, x: { title: { display: true, text: 'Ownership Year' } } }, plugins: { tooltip: { mode: 'index', intersect: false }, legend: { position: 'top', } }, interaction: { mode: 'nearest', axis: 'x', intersect: 0 } } }); } function copyResults() { var primaryResult = document.getElementById('primary-result').innerText; var scheduledMaint = document.getElementById('scheduledMaintenance').innerText; var unscheduledRepairs = document.getElementById('unscheduledRepairs').innerText; var fuelCosts = document.getElementById('fuelCosts').innerText; var depreciation = document.getElementById('depreciation').innerText; var model = getModelLabel(document.getElementById('model').value); var purchasePrice = document.getElementById('purchasePrice').value; var currentMileage = document.getElementById('currentMileage').value; var annualMileage = document.getElementById('annualMileage').value; var ownershipYears = document.getElementById('ownershipYears').value; var fuelType = document.getElementById('fuelType').value; var avgFuelPrice = document.getElementById('avgFuelPrice').value; var copyText = "— Honda Running Cost Estimate —\n\n"; copyText += "Key Assumptions:\n"; copyText += "- Model: " + model + "\n"; copyText += "- Original Purchase Price: $" + purchasePrice + "\n"; copyText += "- Current Mileage: " + currentMileage + " miles\n"; copyText += "- Annual Mileage: " + annualMileage + " miles/year\n"; copyText += "- Ownership Period: " + ownershipYears + " years\n"; copyText += "- Fuel Type: " + fuelType + "\n"; copyText += "- Average Fuel Price: $" + avgFuelPrice + "\n\n"; copyText += "Estimated Costs:\n"; copyText += "- Total Estimated Cost: " + primaryResult + "\n"; copyText += "- Scheduled Maintenance: " + scheduledMaint + "\n"; copyText += "- Unscheduled Repairs: " + unscheduledRepairs + "\n"; copyText += "- Fuel Costs: " + fuelCosts + "\n"; copyText += "- Depreciation: " + depreciation + "\n"; navigator.clipboard.writeText(copyText).then(function() { alert('Results copied to clipboard!'); }, function(err) { console.error('Failed to copy: ', err); alert('Failed to copy results. Please copy manually.'); }); } function resetForm() { document.getElementById('model').value = defaultValues.model; document.getElementById('purchasePrice').value = defaultValues.purchasePrice; document.getElementById('currentMileage').value = defaultValues.currentMileage; document.getElementById('annualMileage').value = defaultValues.annualMileage; document.getElementById('ownershipYears').value = defaultValues.ownershipYears; document.getElementById('fuelType').value = defaultValues.fuelType; document.getElementById('avgFuelPrice').value = defaultValues.avgFuelPrice; // Clear error messages var errorElements = document.querySelectorAll('.error-message'); for (var i = 0; i < errorElements.length; i++) { errorElements[i].innerText = ''; errorElements[i].classList.remove('visible'); } // Reset input borders var inputs = document.querySelectorAll('.input-group input, .input-group select'); for (var i = 0; i < inputs.length; i++) { inputs[i].style.borderColor = '#dee2e6'; } calculateCosts(); // Recalculate with default values } // Initialize FAQ toggles function setupFAQ() { var faqItems = document.querySelectorAll('.faq-item'); faqItems.forEach(function(item) { var question = item.querySelector('.faq-question'); question.addEventListener('click', function() { item.classList.toggle('open'); }); }); } // Initial calculation and chart setup on page load document.addEventListener('DOMContentLoaded', function() { // Load Chart.js library dynamically (ensure you have the library included or hosted) // For this example, we assume Chart.js is available globally. // If not, you would load it via script tag here or ensure it's in the HTML head. // Check if Chart object is available if (typeof Chart !== 'undefined') { resetForm(); // Calculate with default values on load setupFAQ(); } else { console.error("Chart.js library not found. Please ensure it is included."); // Optionally, display a message to the user. } }); <!– You would typically include this in the or just before the closing tag –>

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