Tow Truck Cost Calculator

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Tow Truck Cost Calculator

Estimate your towing expenses with our easy-to-use calculator. Input details about your vehicle and the towing situation to get a cost breakdown and understand the factors influencing the price.

Tow Truck Cost Estimator

Enter the estimated distance in miles.
Weight of the vehicle being towed.
Flatbed Tow Truck Wrecker/Hook Tow Truck Select the type of tow truck needed.
Standard Hours (e.g., 8 AM – 6 PM) After Hours / Emergency (Higher Rate) Indicates if after-hours or emergency rates apply.
None Winching Required Long Carry (e.g., off-road) Heavy Duty Surcharge Additional services that may increase cost.
Percentage added for current fuel costs.

Estimated Towing Cost Summary

$0.00
Base Towing Cost: $0.00
Distance Fee: $0.00
Weight Surcharge: $0.00
Specialty Service Fee: $0.00

Key Assumptions:

Tow Type:
Time:
Specialty Services:
Fuel Surcharge Applied:
How it's Calculated: The total tow cost is determined by a base fee, a per-mile charge, a weight-based surcharge, and any applicable fees for specialty services, all adjusted by a fuel surcharge. Rates vary by tow type, time of day, and specific service needs.

What is a Tow Truck Cost Calculator?

A tow truck cost calculator is an online tool designed to help individuals and businesses estimate the potential expenses associated with hiring a tow truck service. It takes into account various factors that influence the final price, such as the distance the vehicle needs to be towed, the type and weight of the vehicle, the specific services required, and the time of day or urgency of the request. This tow truck cost calculator aims to provide a transparent and accessible way to understand these costs before committing to a service. By inputting key details, users can gain a clearer picture of what to expect financially, helping them budget and make informed decisions during stressful situations like vehicle breakdowns or accidents. This calculator is invaluable for car owners, fleet managers, and anyone who might need roadside assistance. A common misconception is that towing costs are straightforward and solely based on distance; however, many other variables play a significant role, which this tool helps to illuminate.

Tow Truck Cost Calculation Formula and Mathematical Explanation

Understanding the formula behind a tow truck cost calculator is crucial for transparency. While specific pricing models vary among towing companies, a common approach involves several components:

The Core Formula:

Total Cost = (Base Fee + Distance Fee + Weight Surcharge + Specialty Service Fee) * (1 + Fuel Surcharge Percentage)

Variable Breakdown:

  • Base Fee: A flat rate charged by most towing companies just to dispatch the truck and initiate the service. This covers the initial call-out.
  • Distance Fee: A per-mile charge applied to the total distance the vehicle is towed. This is often the most significant variable cost.
  • Weight Surcharge: An additional fee applied if the vehicle exceeds a certain weight threshold, as heavier vehicles require larger, more powerful, and potentially more expensive tow trucks.
  • Specialty Service Fee: Charges for additional services like winching a vehicle out of a ditch, long-distance hauling beyond standard routes, or recovery operations.
  • Fuel Surcharge Percentage: An additional percentage added to the subtotal to account for fluctuating fuel prices.

This calculator uses a simplified yet representative model to provide an estimate. The actual price quoted by a local towing company may differ based on their unique rate structure, location, and unforeseen circumstances.

Variables Table:

Variable Meaning Unit Typical Range (Estimates)
Towing Distance The total mileage the vehicle needs to be transported. Miles 5 – 100+ miles
Vehicle Weight The curb weight of the vehicle being towed. Pounds (lbs) 1,500 – 8,000+ lbs
Tow Type Type of truck used (Flatbed, Wrecker). Affects base rate. Category Flatbed, Wrecker
Time of Day Standard business hours vs. after-hours/emergency. Category Standard, After-Hours/Emergency
Specialty Services Additional services required (e.g., winching). Category None, Winch, Long Carry, etc.
Fuel Surcharge Percentage added for fuel costs. % 0% – 15%
Base Fee Initial dispatch and service fee. USD $50 – $150+
Per-Mile Rate Cost for each mile towed. USD/mile $2 – $10+ per mile

Practical Examples (Real-World Use Cases)

Example 1: Standard Car Tow

Sarah's sedan broke down on the highway, about 15 miles from her home. She needs a standard tow truck during regular business hours. Her car weighs approximately 3,200 lbs. She opts for a flatbed tow truck and doesn't require any special services.

  • Inputs:
  • Distance: 15 miles
  • Vehicle Weight: 3200 lbs
  • Tow Type: Flatbed Tow Truck
  • Time of Day: Standard Hours
  • Specialty Services: None
  • Fuel Surcharge: 5%

Using the calculator, Sarah gets an estimated cost. The calculation might look like this (simplified breakdown):

  • Base Fee: $80
  • Distance Fee (15 miles @ $4/mile): $60
  • Weight Surcharge (for 3200 lbs): $0 (assuming it's below the threshold)
  • Specialty Service Fee: $0
  • Subtotal: $80 + $60 + $0 + $0 = $140
  • Fuel Surcharge (5% of $140): $7
  • Estimated Total Cost: $147

Interpretation: Sarah can expect a cost around $147 for this standard tow. This helps her prepare for the expense and confirm it aligns with typical rates.

Example 2: Emergency Heavy-Duty Tow

A construction company's small backhoe (weighing 7,000 lbs) is stuck in mud at a remote job site, requiring a recovery. It needs to be towed 5 miles to a nearby repair shop. The incident occurs late at night, necessitating an emergency call.

  • Inputs:
  • Distance: 5 miles
  • Vehicle Weight: 7000 lbs
  • Tow Type: Heavy Duty Wrecker
  • Time of Day: After Hours / Emergency
  • Specialty Services: Winching Required
  • Fuel Surcharge: 10%

This situation involves multiple surcharges:

  • Base Fee (Heavy Duty + Emergency): $250
  • Distance Fee (5 miles @ $8/mile for HD): $40
  • Weight Surcharge (for 7000 lbs): $50
  • Specialty Service Fee (Winching): $100
  • Subtotal: $250 + $40 + $50 + $100 = $440
  • Fuel Surcharge (10% of $440): $44
  • Estimated Total Cost: $484

Interpretation: The emergency nature, heavy vehicle, and recovery service significantly increase the cost. The company should budget around $484, understanding that specialized services command higher prices. This scenario highlights why using a tow truck cost calculator is important for non-standard situations.

Dynamic Cost Breakdown Table

This table shows how different components contribute to your estimated tow cost based on the inputs provided above.

Cost Component Breakdown
Component Details Estimated Cost
Base Fee $0.00
Distance Fee $0.00
Weight Surcharge $0.00
Specialty Service Fee $0.00
Subtotal Sum of above components $0.00
Fuel Surcharge $0.00
Total Estimated Cost Final estimate $0.00

Estimated Cost vs. Distance Chart

Chart showing how the estimated total tow cost changes with increasing towing distance, assuming other factors remain constant.

How to Use This Tow Truck Cost Calculator

Using this tow truck cost calculator is straightforward and designed to provide quick estimates. Follow these steps:

  1. Enter Towing Distance: Input the approximate number of miles the vehicle needs to be towed. Be as accurate as possible.
  2. Specify Vehicle Weight: Provide the weight of the vehicle in pounds (lbs). Check your vehicle's manual or online specifications if unsure.
  3. Select Tow Type: Choose between a 'Flatbed Tow Truck' (ideal for most vehicles, especially AWD/4WD) or a 'Wrecker/Hook Tow Truck' (often used for simpler tows or specific situations).
  4. Indicate Time of Day: Select 'Standard Hours' or 'After Hours / Emergency' as applicable. Emergency calls typically incur higher rates.
  5. Add Specialty Services: If your situation requires extra help like winching from a ditch, long-distance hauling, or if your vehicle is particularly heavy, select the relevant option.
  6. Set Fuel Surcharge: Enter the current fuel surcharge percentage. If unsure, a default value is often provided or can be estimated.
  7. Calculate: Click the "Calculate Cost" button.

Reading the Results:

The calculator will display:

  • Total Estimated Cost: The main, highlighted figure representing the overall expected cost.
  • Intermediate Values: Breakdowns including Base Cost, Distance Fee, Weight Surcharge, and Specialty Service Fee. This helps you see where the costs are coming from.
  • Key Assumptions: Details on the inputs you selected (e.g., Tow Type, Time of Day) that influenced the estimate.
  • Cost Breakdown Table: A structured view of each cost component.
  • Dynamic Chart: A visual representation of how cost scales with distance.

Decision-Making Guidance:

Use the results to:

  • Compare potential costs from different service providers (if you have quotes).
  • Budget for the towing service.
  • Understand if the cost seems reasonable for the service requested.
  • Identify potential areas where costs might be reduced (e.g., if the vehicle can be moved slightly to avoid winching fees).

Remember, this is an estimate. Always confirm the final price with the towing company before they commence service.

Key Factors That Affect Tow Truck Costs

Several elements influence the final price you'll pay for a tow truck service. Understanding these factors can help you anticipate costs and potentially negotiate better rates.

  1. Distance of Tow: This is often the primary cost driver. Most companies charge a per-mile rate after an initial hook-up or short-distance fee. Longer distances naturally incur higher costs.
  2. Vehicle Type and Weight: Lighter passenger cars are cheaper to tow than heavy-duty trucks, RVs, or specialized vehicles. Heavier vehicles require more powerful (and expensive) equipment, increasing the base rate or adding a surcharge.
  3. Type of Tow Truck: A standard wrecker might be cheaper than a heavy-duty flatbed. Flatbeds are often preferred for ensuring vehicle safety but can sometimes carry a higher cost. The tow truck cost calculator allows you to compare based on type.
  4. Time of Day and Urgency: Towing services during standard business hours (e.g., 8 AM to 6 PM on weekdays) are generally less expensive than after-hours, late-night, weekend, or emergency towing. Emergency services often have significantly higher rates due to on-call availability.
  5. Location and Accessibility: Towing from remote, difficult-to-access locations (like off-road, narrow alleys, or steep inclines) may incur extra charges for specialized equipment or labor (e.g., winching fees). Urban areas might also have different pricing structures than rural ones.
  6. Specialty Services Required: Beyond basic towing, services like winching, lockout assistance, jump-starts, tire changes, or accident recovery add to the cost. Each specialized service typically has its own fee.
  7. Fuel Surcharges: With volatile fuel prices, many towing companies implement a fuel surcharge, often calculated as a percentage of the total service cost. This helps them manage operational expenses.
  8. Company Rates and Fees: Each towing company sets its own pricing structure. This includes base hook-up fees, per-mile rates, hourly rates for recovery, and administrative fees. It's wise to get a quote and ask about all potential charges upfront.

Frequently Asked Questions (FAQ)

Q1: How accurate is a tow truck cost calculator?

A tow truck cost calculator provides an estimate based on common industry rates and the information you input. Actual costs can vary due to specific company pricing, unforeseen complications at the scene, or final mileage discrepancies. It's a helpful guide, not a fixed quote.

Q2: What is a standard tow truck cost per mile?

The standard tow truck cost per mile typically ranges from $2 to $10, depending on the vehicle's weight, the type of truck used, and the geographic location. Heavy-duty towing usually falls at the higher end of this range.

Q3: Do towing companies charge a hook-up fee?

Yes, most towing companies charge a base fee, often referred to as a hook-up fee or dispatch fee. This covers the cost of sending a truck to your location and preparing the vehicle for towing.

Q4: Is emergency towing significantly more expensive?

Yes, emergency or after-hours towing usually costs more than standard daytime towing. This is because towing companies need to pay their drivers overtime or keep trucks available 24/7, which increases operational costs.

Q5: Should I use a flatbed or a wrecker?

A flatbed tow truck is generally recommended for most vehicles, especially those with all-wheel drive (AWD), four-wheel drive (4WD), luxury cars, or vehicles with low ground clearance, as it prevents wear on the drivetrain and suspension. Wreckers (hook trucks) are suitable for simpler tows of front-wheel-drive or rear-wheel-drive vehicles where the drive wheels can be safely lifted off the ground.

Q6: What if my car is in a difficult-to-reach location?

If your vehicle is in a tricky spot (e.g., ditch, mud, narrow space), you may need specialized services like winching or recovery. These services typically incur additional fees beyond standard towing costs due to the extra time, equipment, and labor involved.

Q7: How can I get the best price for a tow?

To get the best price, use a tow truck cost calculator to estimate, then call multiple reputable towing companies for quotes. Ask about their base rates, per-mile charges, any potential surcharges, and if they offer discounts (e.g., for AAA members or specific insurance policies). Be clear about your vehicle's details and the situation.

Q8: Does my car insurance cover towing costs?

Some auto insurance policies include roadside assistance or towing coverage as an add-on or part of a premium package. Check your policy details or contact your insurance provider to see if towing is covered and what the limits or deductibles are. Services like AAA also offer towing benefits.

Q9: What is a 'long carry' fee?

A 'long carry' fee usually applies when the tow truck needs to travel a significant distance beyond its typical service area or base location to reach the pickup point, or if the destination is exceptionally far. It helps compensate for the extra fuel and time involved.

Related Tools and Internal Resources

Explore these related tools and resources to further assist with your automotive and financial planning needs:

Disclaimer: This calculator provides estimated costs based on typical industry rates. Actual prices may vary. Always confirm final costs with your chosen towing service provider.

var baseRatePerMile = 4; // Standard rate per mile for regular tow var heavyDutyRatePerMile = 8; // Higher rate for heavy duty var baseFee = 80; // Standard base fee var heavyDutyBaseFee = 150; // Higher base fee for heavy duty var weightThreshold = 4000; // lbs var weightSurchargePerLbOver = 0.10; // $0.10 per lb over threshold var heavyDutyWeightSurchargePerLbOver = 0.20; // Higher rate for heavy duty var specialtyWinchingFee = 100; var specialtyLongCarryFee = 75; var specialtyHeavyDutySurcharge = 50; // Base surcharge for heavy duty if not covered by per lb rate var afterHoursFee = 60; // Flat fee for after hours function validateInput(id, errorId, min, max) { var input = document.getElementById(id); var errorElement = document.getElementById(errorId); var value = parseFloat(input.value); if (isNaN(value)) { errorElement.textContent = "Please enter a valid number."; return false; } if (value < 0) { errorElement.textContent = "Value cannot be negative."; return false; } if (min !== undefined && value max) { errorElement.textContent = "Value cannot exceed " + max + "."; return false; } errorElement.textContent = ""; // Clear error message return true; } function calculateTowCost() { // — Input Validation — var isValidDistance = validateInput('distance', 'distanceError', 0); var isValidWeight = validateInput('vehicleWeight', 'vehicleWeightError', 0); var isValidFuel = validateInput('fuelSurcharge', 'fuelSurchargeError', 0, 100); if (!isValidDistance || !isValidWeight || !isValidFuel) { document.getElementById('results').style.display = 'none'; return; } // — Get Values — var distance = parseFloat(document.getElementById('distance').value); var vehicleWeight = parseFloat(document.getElementById('vehicleWeight').value); var towType = document.getElementById('towType').value; var timeOfDay = document.getElementById('timeOfDay').value; var specialNeeds = document.getElementById('specialNeeds').value; var fuelSurchargePercent = parseFloat(document.getElementById('fuelSurcharge').value); // — Determine Rates and Fees based on inputs — var currentBaseFee = baseFee; var currentRatePerMile = baseRatePerMile; var weightSurcharge = 0; var specialtyFee = 0; var additionalFees = 0; var isHeavyDuty = false; // Tow Type and Base Rates if (towType === "wrecker") { // Assuming wrecker implies potentially heavier duty or different structure currentBaseFee = heavyDutyBaseFee; currentRatePerMile = heavyDutyRatePerMile; isHeavyDuty = true; // Flagging as potentially heavy duty } // Vehicle Weight and Surcharge if (vehicleWeight > weightThreshold) { isHeavyDuty = true; // Definitely heavy duty if over threshold var weightOver = vehicleWeight – weightThreshold; // Using a combined approach: if it's designated heavy duty by type, use a specific surcharge, otherwise use per lb. // For simplicity here, let's apply a general heavy duty surcharge if over threshold or selected as HD wrecker if(towType === "wrecker") { // If wrecker selected, assume it's meant for heavier loads weightSurcharge = specialtyHeavyDutySurcharge; } else { // If it's a regular car but heavy, apply per lb rate weightSurcharge = weightOver * weightSurchargePerLbOver; } } else if (towType === "wrecker") { // If wrecker selected but weight is under threshold weightSurcharge = specialtyHeavyDutySurcharge; // Apply base HD surcharge } // Specialty Services if (specialNeeds === "winch") { specialtyFee += specialtyWinchingFee; } else if (specialNeeds === "longCarry") { specialtyFee += specialtyLongCarryFee; } else if (specialNeeds === "heavyDuty" && !isHeavyDuty) { // Apply if selected specifically and not already covered specialtyFee += specialtyHeavyDutySurcharge; } // Time of Day if (timeOfDay === "afterHours") { additionalFees += afterHoursFee; } // Calculate Intermediate Values var distanceFee = distance * currentRatePerMile; var subTotal = currentBaseFee + distanceFee + weightSurcharge + specialtyFee + additionalFees; var fuelSurchargeAmount = subTotal * (fuelSurchargePercent / 100); var totalCost = subTotal + fuelSurchargeAmount; // — Display Results — document.getElementById('results').style.display = 'block'; document.getElementById('totalCost').textContent = '$' + totalCost.toFixed(2); // Intermediate Results document.getElementById('baseCostDiv').children[1].textContent = '$' + currentBaseFee.toFixed(2); document.getElementById('distanceFeeDiv').children[1].textContent = '$' + distanceFee.toFixed(2); document.getElementById('weightSurchargeDiv').children[1].textContent = '$' + weightSurcharge.toFixed(2); document.getElementById('specialtyFeeDiv').children[1].textContent = '$' + (specialtyFee + additionalFees).toFixed(2); // Combine specialty and other add-ons // Assumptions document.getElementById('towTypeAssumption').children[1].textContent = document.getElementById('towType').options[document.getElementById('towType').selectedIndex].text; document.getElementById('timeOfDayAssumption').children[1].textContent = document.getElementById('timeOfDay').options[document.getElementById('timeOfDay').selectedIndex].text; document.getElementById('specialNeedsAssumption').children[1].textContent = document.getElementById('specialNeeds').options[document.getElementById('specialNeeds').selectedIndex].text; document.getElementById('fuelSurchargeAssumption').children[1].textContent = fuelSurchargePercent + '%'; // Table Update document.getElementById('tableBaseFeeDetail').textContent = towType === "wrecker" ? "Heavy Duty Base Fee" : "Standard Base Fee"; document.getElementById('tableBaseFeeCost').textContent = '$' + currentBaseFee.toFixed(2); document.getElementById('tableDistanceFeeDetail').textContent = distance + " miles @ $" + currentRatePerMile + "/mile"; document.getElementById('tableDistanceFeeCost').textContent = '$' + distanceFee.toFixed(2); document.getElementById('tableWeightSurchargeDetail').textContent = vehicleWeight + " lbs" + (vehicleWeight > weightThreshold ? " (Over Threshold)" : ""); document.getElementById('tableWeightSurchargeCost').textContent = '$' + weightSurcharge.toFixed(2); var otherFeesText = []; if (specialtyFee > 0) otherFeesText.push("Specialty Services"); if (additionalFees > 0) otherFeesText.push("After Hours"); document.getElementById('tableSpecialtyFeeDetail').textContent = otherFeesText.join(', '); document.getElementById('tableSpecialtyFeeCost').textContent = '$' + (specialtyFee + additionalFees).toFixed(2); document.getElementById('tableSubtotalCost').textContent = '$' + subTotal.toFixed(2); document.getElementById('tableFuelSurchargeDetail').textContent = fuelSurchargePercent + '%'; document.getElementById('tableFuelSurchargeCost').textContent = '$' + fuelSurchargeAmount.toFixed(2); document.getElementById('tableTotalCost').textContent = '$' + totalCost.toFixed(2); updateChart(distance, totalCost); } function resetForm() { document.getElementById('distance').value = 25; document.getElementById('vehicleWeight').value = 3500; document.getElementById('towType').value = 'flatbed'; document.getElementById('timeOfDay').value = 'standard'; document.getElementById('specialNeeds').value = 'none'; document.getElementById('fuelSurcharge').value = 5; // Clear errors document.getElementById('distanceError').textContent = ""; document.getElementById('vehicleWeightError').textContent = ""; document.getElementById('fuelSurchargeError').textContent = ""; // Hide results initially document.getElementById('results').style.display = 'none'; // Clear table document.getElementById('tableBaseFeeCost').textContent = '$0.00'; document.getElementById('tableDistanceFeeCost').textContent = '$0.00'; document.getElementById('tableWeightSurchargeCost').textContent = '$0.00'; document.getElementById('tableSpecialtyFeeCost').textContent = '$0.00'; document.getElementById('tableSubtotalCost').textContent = '$0.00'; document.getElementById('tableFuelSurchargeCost').textContent = '$0.00'; document.getElementById('tableTotalCost').textContent = '$0.00'; // Clear table details document.getElementById('tableBaseFeeDetail').textContent = ""; document.getElementById('tableDistanceFeeDetail').textContent = ""; document.getElementById('tableWeightSurchargeDetail').textContent = ""; document.getElementById('tableSpecialtyFeeDetail').textContent = ""; document.getElementById('tableFuelSurchargeDetail').textContent = ""; // Reset chart data visually if possible, or clear if (typeof window.costChartInstance !== 'undefined') { window.costChartInstance.data.labels = []; window.costChartInstance.data.datasets[0].data = []; window.costChartInstance.data.datasets[1].data = []; window.costChartInstance.update(); } } function copyResults() { var mainResultElement = document.getElementById('totalCost'); var intermediateDivs = document.querySelectorAll('.intermediate-results div'); var assumptionDivs = document.querySelectorAll('.assumptions div'); var formulaExplanation = document.querySelector('.formula-explanation strong').textContent + " " + document.querySelector('.formula-explanation').textContent.replace('How it\'s Calculated:', ").trim(); var textToCopy = "Estimated Towing Cost Summary:\n"; textToCopy += "Total Cost: " + mainResultElement.textContent + "\n\n"; textToCopy += "Breakdown:\n"; intermediateDivs.forEach(function(div) { textToCopy += div.textContent.replace(':', ': ') + "\n"; }); textToCopy += "\nKey Assumptions:\n"; assumptionDivs.forEach(function(div) { textToCopy += div.textContent.replace(':', ': ') + "\n"; }); textToCopy += "\n" + formulaExplanation; // Use a temporary textarea to copy var tempTextArea = document.createElement("textarea"); tempTextArea.value = textToCopy; document.body.appendChild(tempTextArea); tempTextArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied to clipboard!' : 'Failed to copy results.'; // Optionally provide user feedback console.log(msg); alert(msg); // Simple alert for feedback } catch (err) { console.log('Unable to copy results', err); alert('Failed to copy results. Please copy manually.'); } document.body.removeChild(tempTextArea); } // — Charting — var canvas = document.getElementById('costChart'); var ctx = canvas.getContext('2d'); var costChartInstance; function updateChart(currentDistance, currentTotalCost) { // Simulate data points for the chart based on distance var distances = []; var estimatedCosts = []; var baseDist = parseFloat(document.getElementById('distance').value); var baseCost = currentTotalCost; // Use the current calculated cost as the reference point // Generate points around the current input distance for (var i = 0; i weightThreshold) { var weightOver = vehicleWeight – weightThreshold; if(selectedTowType === "wrecker") { simulatedWeightSurcharge = specialtyHeavyDutySurcharge; } else { simulatedWeightSurcharge = weightOver * weightSurchargePerLbOver; } } else if (selectedTowType === "wrecker") { simulatedWeightSurcharge = specialtyHeavyDutySurcharge; } if (selectedSpecialNeeds === "winch") simulatedSpecialtyFee += specialtyWinchingFee; else if (selectedSpecialNeeds === "longCarry") simulatedSpecialtyFee += specialtyLongCarryFee; else if (selectedSpecialNeeds === "heavyDuty" && selectedTowType !== "wrecker") simulatedSpecialtyFee += specialtyHeavyDutySurcharge; if (selectedTimeOfDay === "afterHours") simulatedAdditionalFees += afterHoursFee; var simulatedDistanceFee = dist * simulatedRatePerMile; var simulatedSubTotal = simulatedBaseFee + simulatedDistanceFee + simulatedWeightSurcharge + simulatedSpecialtyFee + simulatedAdditionalFees; var simulatedFuelSurchargeAmount = simulatedSubTotal * (simulatedFuelSurchargePercent / 100); var simulatedTotalCost = simulatedSubTotal + simulatedFuelSurchargeAmount; estimatedCosts.push(simulatedTotalCost); } if (costChartInstance) { costChartInstance.data.labels = distances.map(function(d) { return d.toFixed(0) + ' mi'; }); costChartInstance.data.datasets[0].data = estimatedCosts; costChartInstance.data.datasets[1].data = estimatedCosts.map(function(c) { return currentTotalCost; }); // Line showing current calculation costChartInstance.update(); } else { // Initialize chart costChartInstance = new Chart(ctx, { type: 'line', data: { labels: distances.map(function(d) { return d.toFixed(0) + ' mi'; }), datasets: [ { label: 'Estimated Cost Trend', data: estimatedCosts, borderColor: 'rgba(0, 74, 153, 1)', // Primary color backgroundColor: 'rgba(0, 74, 153, 0.2)', fill: false, tension: 0.1 }, { label: 'Current Calculation (' + currentDistance.toFixed(0) + ' mi)', data: estimatedCosts.map(function(c) { return currentTotalCost; }), // Constant line at current value borderColor: 'rgba(40, 167, 69, 1)', // Success color borderWidth: 2, borderDash: [5, 5], // Dashed line pointRadius: 0, // No points on this line fill: false, tension: 0 } ] }, options: { responsive: true, maintainAspectRatio: false, plugins: { legend: { display: true, position: 'top' }, title: { display: true, text: 'Estimated Tow Cost vs. Distance' } }, scales: { x: { title: { display: true, text: 'Towing Distance (miles)' } }, y: { title: { display: true, text: 'Estimated Cost ($)' }, beginAtZero: true } } } }); } } // Function to toggle FAQ answers function toggleFaq(element) { var paragraph = element.nextElementSibling; paragraph.style.display = (paragraph.style.display === 'block') ? 'none' : 'block'; element.parentElement.classList.toggle('open'); } // Initial calculation on page load if defaults are set document.addEventListener('DOMContentLoaded', function() { // Trigger initial calculation if default values are present and sensible if (document.getElementById('distance').value && document.getElementById('vehicleWeight').value && document.getElementById('fuelSurcharge').value) { calculateTowCost(); } });

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