Vehicle Gas Calculator: Estimate Your Fuel Costs
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Your Estimated Fuel Costs
—
Key Assumptions
Fuel Price: —
Fuel Efficiency: —
Distance: —
Fuel Cost Over Time
Visualizing your estimated fuel costs over different distances.
What is a Vehicle Gas Calculator?
A vehicle gas calculator, often referred to as a fuel cost calculator or mileage cost calculator, is an online tool designed to help individuals and businesses estimate the amount of money they will spend on fuel for their vehicles over a specific period or distance. It takes into account crucial factors such as the distance to be traveled, the vehicle's fuel efficiency (how much fuel it consumes per unit of distance), the type of fuel used, and the current price of that fuel. By inputting these variables, the calculator provides a clear projection of fuel expenses, enabling better budgeting and financial planning for transportation.
Vehicle Gas Calculator Formula and Mathematical Explanation
The core of any vehicle gas calculator relies on a few fundamental formulas. The primary goal is to determine the total fuel needed and then multiply that by the price of fuel. Here's a breakdown:
1. Fuel Consumed: This is the total amount of fuel your vehicle will use. The calculation depends on the units used for fuel efficiency:
- If efficiency is in Miles Per Gallon (MPG) or Kilometers Per Liter (KPL):
Fuel Consumed = Distance / Fuel Efficiency
- If efficiency is in Liters Per 100 Kilometers (L/100km):
Fuel Consumed (Liters) = (Distance / 100) * Fuel Efficiency (L/100km)
2. Total Fuel Cost: Once you know how much fuel you'll consume, you multiply it by the price per unit of fuel.
Total Fuel Cost = Fuel Consumed * Fuel Price
3. Cost Per Distance Unit: This metric helps understand the ongoing cost of driving.
Cost Per Distance Unit = Total Fuel Cost / Distance
4. Estimated Trips on Full Tank: This requires an assumed tank size, which is often a standard value or user input. For example, if a car has a 15-gallon tank:
Estimated Trips = Tank Size / Fuel Consumed
Our calculator uses these principles to provide accurate estimates. For instance, driving 500 miles with a car that gets 25 MPG and fuel costing $3.50 per gallon would mean 500 miles / 25 MPG = 20 gallons consumed. The total cost would be 20 gallons * $3.50/gallon = $70.
Practical Examples (Real-World Use Cases)
Understanding your fuel costs is vital for various scenarios. Here are a few practical examples:
- Commuting: If you drive 30 miles round trip daily, 5 days a week, and your car gets 30 MPG with gas at $3.75/gallon, you'd consume approximately 5 gallons per week (150 miles / 30 MPG). This translates to about $18.75 weekly, or nearly $1000 annually just for commuting. Our vehicle gas calculator can quickly show this.
- Road Trips: Planning a 1200-mile vacation? With a vehicle averaging 28 MPG and fuel at $3.60/gallon, you'd need about 43 gallons (1200 / 28). The estimated fuel cost would be around $155 (43 * $3.60). This helps budget for travel expenses.
- Fleet Management: Businesses managing multiple vehicles can use this tool to estimate operational costs. For a fleet of 10 delivery vans each driving 2000 miles/month, getting 15 MPG, with diesel at $4.00/gallon, the monthly fuel cost per van is roughly $267 (2000 / 15 * $4.00). Total fleet cost would be significant.
- Comparing Vehicles: When considering a new car, you can use a fuel cost calculator to compare the long-term savings. A more fuel-efficient car, even with a higher purchase price, might save thousands in fuel costs over its lifespan compared to a less efficient model. This is a key aspect of total cost of ownership.
How to Use This Vehicle Gas Calculator
Using our vehicle gas calculator is straightforward. Follow these simple steps:
- Enter Distance Driven: Input the total distance you intend to travel. Specify whether this is in miles or kilometers using the dropdown.
- Input Fuel Efficiency: Enter your vehicle's fuel efficiency rating. Select the corresponding unit (MPG, KPL, or L/100km).
- Select Fuel Type: Choose the type of fuel your vehicle uses (Gasoline, Diesel, or Electric).
- Enter Fuel Price: Provide the current price per unit for your selected fuel type.
- Select Units: Ensure your Distance Unit and Efficiency Unit selections match your inputs.
- Click 'Calculate Costs': The calculator will instantly display your estimated total fuel cost, fuel consumed, cost per distance unit, and estimated trips on a full tank.
- Review Results: Examine the primary result and intermediate values. The table provides a detailed breakdown, and the chart visualizes costs over distance.
- Reset or Copy: Use the 'Reset' button to clear fields and start over, or 'Copy Results' to save your findings.
This tool is designed for quick and accurate estimations, helping you manage your vehicle running costs effectively.
Key Factors That Affect Vehicle Gas Calculator Results
While the calculator provides a solid estimate, several real-world factors can influence your actual fuel consumption and costs:
- Driving Habits: Aggressive acceleration and hard braking consume significantly more fuel than smooth, steady driving.
- Terrain and Road Conditions: Driving uphill requires more energy, and stop-and-go traffic in cities is less efficient than highway cruising.
- Vehicle Maintenance: Properly inflated tires, clean air filters, and regular engine tune-ups improve fuel efficiency. Neglected maintenance can decrease MPG.
- Vehicle Load: Carrying heavy loads or excessive weight increases fuel consumption.
- Environmental Factors: Cold weather can temporarily reduce fuel efficiency, and using air conditioning also increases fuel use.
- Fuel Price Volatility: Gas and diesel prices fluctuate daily based on market conditions, geopolitical events, and supply/demand. The price you input is a snapshot in time.
- Accuracy of Efficiency Rating: The stated MPG or L/100km is often an average under ideal conditions. Real-world efficiency can vary.
Always consider these variables when planning your budget. Our calculator provides a baseline for your fuel budget planning.
Frequently Asked Questions (FAQ)
What is considered good fuel efficiency?
Generally, vehicles achieving over 30 MPG are considered fuel-efficient for gasoline cars. For diesel, it might be slightly lower. Electric vehicles are measured in MPGe (Miles Per Gallon equivalent) or kWh per 100 miles, with higher numbers indicating better efficiency.
How often should I check my fuel prices?
Fuel prices can change daily. For accurate budgeting, it's best to check current local prices before a long trip or when filling up. Many apps and websites track real-time fuel prices.
Does driving speed affect fuel economy?
Yes, significantly. Most cars are most fuel-efficient at moderate speeds (around 45-55 mph). Fuel economy typically decreases rapidly at speeds above 60 mph due to increased aerodynamic drag.
What's the difference between MPG and L/100km?
MPG (Miles Per Gallon) measures how many miles a vehicle can travel on one gallon of fuel. Higher MPG means better efficiency. L/100km (Liters per 100 Kilometers) measures how many liters of fuel are consumed to travel 100 kilometers. Lower L/100km means better efficiency. They are inverse measures of fuel consumption.
Can I use this calculator for electric vehicles?
Yes, you can! Select 'Electric (kWh)' for fuel type and input the cost per kWh. The calculator will estimate charging costs based on your vehicle's energy consumption (similar to L/100km but in kWh/100km or kWh/mile).
Related Tools and Internal Resources
var distanceInput = document.getElementById('distance');
var fuelEfficiencyInput = document.getElementById('fuelEfficiency');
var fuelTypeSelect = document.getElementById('fuelType');
var fuelPriceInput = document.getElementById('fuelPrice');
var efficiencyUnitSelect = document.getElementById('efficiencyUnit');
var distanceUnitSelect = document.getElementById('distanceUnit');
var distanceError = document.getElementById('distanceError');
var fuelEfficiencyError = document.getElementById('fuelEfficiencyError');
var fuelPriceError = document.getElementById('fuelPriceError');
var primaryResultDiv = document.getElementById('primary-result');
var gallonsOrLitersDiv = document.getElementById('gallonsOrLiters');
var costPerDistanceDiv = document.getElementById('costPerDistance');
var totalTripsDiv = document.getElementById('totalTrips');
var assumedFuelPriceDiv = document.getElementById('assumedFuelPrice');
var assumedEfficiencyDiv = document.getElementById('assumedEfficiency');
var assumedDistanceDiv = document.getElementById('assumedDistance');
var tableDistanceUnit = document.getElementById('tableDistanceUnit');
var tableFuelConsumed = document.getElementById('tableFuelConsumed');
var tableTotalCost = document.getElementById('tableTotalCost');
var tableCostPerDistance = document.getElementById('tableCostPerDistance');
var chart = null;
var chartContext = null;
function validateInput(inputElement, errorElement, minValue, maxValue) {
var value = parseFloat(inputElement.value);
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errorElement.textContent = 'Value cannot be negative.';
isValid = false;
} else if (minValue !== undefined && value maxValue) {
errorElement.textContent = 'Value is too high.';
isValid = false;
}
return isValid;
}
function calculateFuelCost() {
var distance = parseFloat(distanceInput.value);
var fuelEfficiency = parseFloat(fuelEfficiencyInput.value);
var fuelPrice = parseFloat(fuelPriceInput.value);
var fuelType = fuelTypeSelect.value;
var efficiencyUnit = efficiencyUnitSelect.value;
var distanceUnit = distanceUnitSelect.value;
var distanceValid = validateInput(distanceInput, distanceError, 0);
var fuelEfficiencyValid = validateInput(fuelEfficiencyInput, fuelEfficiencyError, 0.1); // Min efficiency > 0
var fuelPriceValid = validateInput(fuelPriceInput, fuelPriceError, 0);
if (!distanceValid || !fuelEfficiencyValid || !fuelPriceValid) {
primaryResultDiv.textContent = '–';
gallonsOrLitersDiv.innerHTML = 'Fuel Consumed: –';
costPerDistanceDiv.innerHTML = 'Cost Per Distance Unit: –';
totalTripsDiv.innerHTML = 'Estimated Trips on Full Tank: –';
updateTable('–', '–', '–', '–');
updateChart([], []);
return;
}
var fuelConsumed = 0;
var unitFuelConsumed = ";
var unitCostPerDistance = ";
var currencySymbol = '$'; // Default
if (fuelType === 'electric') {
currencySymbol = '$'; // Assuming USD for electricity cost
unitFuelConsumed = 'kWh';
unitCostPerDistance = currencySymbol + '/unit';
if (efficiencyUnit === 'kpl' || efficiencyUnit === 'lp100km') {
// Electric efficiency is often kWh/mile or kWh/100km
// We'll assume the user inputs kWh/mile or kWh/100km and adjust
if (efficiencyUnit === 'kpl') { // Treat kpl as miles per kWh for simplicity here, or adjust logic
// This case needs clarification on how electric efficiency is input.
// Assuming kWh/mile for now if kpl is selected for electric.
// A better approach would be a dedicated electric efficiency unit.
// For now, let's assume kWh/mile if kpl is selected.
fuelConsumed = distance / fuelEfficiency; // distance (miles) / (miles/kWh) = kWh
} else { // lp100km
fuelConsumed = (distance / 100) * fuelEfficiency; // (distance/100) * (kWh/100km) = kWh
}
} else { // mpg equivalent, assume miles/kWh
fuelConsumed = distance / fuelEfficiency; // distance (miles) / (miles/kWh) = kWh
}
} else { // Gasoline or Diesel
currencySymbol = '$'; // Default to USD, could be localized
unitFuelConsumed = (efficiencyUnit === 'mpg') ? 'gallons' : 'liters';
unitCostPerDistance = currencySymbol + '/' + (distanceUnit === 'miles' ? 'mile' : 'km');
if (efficiencyUnit === 'mpg') {
fuelConsumed = distance / fuelEfficiency; // miles / (miles/gallon) = gallons
if (distanceUnit === 'km') {
// Convert distance to miles for calculation if efficiency is MPG
distance = distance * 0.621371; // km to miles
fuelConsumed = distance / fuelEfficiency;
}
} else if (efficiencyUnit === 'kpl') {
fuelConsumed = distance / fuelEfficiency; // km / (km/liter) = liters
if (distanceUnit === 'miles') {
// Convert distance to km for calculation if efficiency is KPL
distance = distance * 1.60934; // miles to km
fuelConsumed = distance / fuelEfficiency;
}
} else { // lp100km
fuelConsumed = (distance / 100) * fuelEfficiency; // (km/100) * (liters/100km) = liters
if (distanceUnit === 'miles') {
// Convert distance to km for calculation if efficiency is L/100km
distance = distance * 1.60934; // miles to km
fuelConsumed = (distance / 100) * fuelEfficiency;
}
}
}
var totalFuelCost = fuelConsumed * fuelPrice;
var costPerDistanceUnit = totalFuelCost / parseFloat(distanceInput.value); // Use original distance input for cost per unit
// Handle potential division by zero for costPerDistanceUnit if distance is 0
if (parseFloat(distanceInput.value) === 0) {
costPerDistanceUnit = 0;
}
// Estimated Trips Calculation (Requires an assumed tank size)
// Let's assume a common tank size for demonstration. This could be an input field.
var assumedTankSize = 15; // Default to 15 gallons/liters
if (fuelType === 'electric') assumedTankSize = 60; // Example for a 60 kWh battery
var estimatedTrips = '–';
if (fuelConsumed > 0) {
estimatedTrips = (assumedTankSize / fuelConsumed).toFixed(1);
}
primaryResultDiv.textContent = currencySymbol + totalFuelCost.toFixed(2);
gallonsOrLitersDiv.innerHTML = 'Fuel Consumed: ' + fuelConsumed.toFixed(2) + ' ' + unitFuelConsumed;
costPerDistanceDiv.innerHTML = 'Cost Per Distance Unit: ' + currencySymbol + costPerDistanceUnit.toFixed(2) + ' per ' + (distanceUnit === 'miles' ? 'mile' : 'km');
totalTripsDiv.innerHTML = 'Estimated Trips on Full Tank: ' + estimatedTrips;
assumedFuelPriceDiv.innerHTML = 'Fuel Price: ' + currencySymbol + fuelPrice.toFixed(2) + ' per unit';
assumedEfficiencyDiv.innerHTML = 'Fuel Efficiency: ' + fuelEfficiency.toFixed(1) + ' ' + efficiencyUnit;
assumedDistanceDiv.innerHTML = 'Distance: ' + distanceInput.value + ' ' + distanceUnit;
updateTable(distanceUnit, fuelConsumed.toFixed(2) + ' ' + unitFuelConsumed, currencySymbol + totalFuelCost.toFixed(2), currencySymbol + costPerDistanceUnit.toFixed(2) + ' per ' + (distanceUnit === 'miles' ? 'mile' : 'km'));
updateChart();
}
function updateTable(distUnit, consumed, totalCost, costPerDist) {
tableDistanceUnit.textContent = distUnit;
tableFuelConsumed.textContent = consumed;
tableTotalCost.textContent = totalCost;
tableCostPerDistance.textContent = costPerDist;
}
function updateChart() {
var distance = parseFloat(distanceInput.value);
var fuelEfficiency = parseFloat(fuelEfficiencyInput.value);
var fuelPrice = parseFloat(fuelPriceInput.value);
var efficiencyUnit = efficiencyUnitSelect.value;
var distanceUnit = distanceUnitSelect.value;
var fuelType = fuelTypeSelect.value;
var distanceValid = parseFloat(distanceInput.value) > 0;
var fuelEfficiencyValid = parseFloat(fuelEfficiencyInput.value) > 0;
var fuelPriceValid = parseFloat(fuelPriceInput.value) >= 0;
if (!distanceValid || !fuelEfficiencyValid || !fuelPriceValid) {
if (chart) {
chart.destroy();
chart = null;
}
return;
}
var distances = [];
var costs = [];
var maxDistance = distance > 0 ? distance * 2 : 1000; // Show up to double the input distance, or 1000 if input is 0
var step = maxDistance / 10;
for (var i = 0; i <= 10; i++) {
var currentDistance = step * i;
distances.push(currentDistance.toFixed(0));
var currentFuelConsumed = 0;
if (fuelType === 'electric') {
if (efficiencyUnit === 'kpl') {
currentFuelConsumed = currentDistance / fuelEfficiency;
} else { // lp100km or mpg equivalent
currentFuelConsumed = (currentDistance / 100) * fuelEfficiency;
}
} else {
if (efficiencyUnit === 'mpg') {
currentFuelConsumed = currentDistance / fuelEfficiency;
} else if (efficiencyUnit === 'kpl') {
currentFuelConsumed = currentDistance / fuelEfficiency;
} else { // lp100km
currentFuelConsumed = (currentDistance / 100) * fuelEfficiency;
}
}
var currentTotalCost = currentFuelConsumed * fuelPrice;
costs.push(currentTotalCost.toFixed(2));
}
if (!chartContext) {
chartContext = document.getElementById('fuelCostChart').getContext('2d');
}
if (chart) {
chart.destroy();
}
chart = new Chart(chartContext, {
type: 'line',
data: {
labels: distances,
datasets: [{
label: 'Total Fuel Cost',
data: costs,
borderColor: 'var(–primary-color)',
backgroundColor: 'rgba(0, 74, 153, 0.1)',
fill: true,
tension: 0.1
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
scales: {
x: {
title: {
display: true,
labelString: 'Distance (' + distanceUnit + ')'
}
},
y: {
title: {
display: true,
labelString: 'Cost (' + (fuelType === 'electric' ? '$' : '$') + ')'
},
beginAtZero: true
}
},
plugins: {
legend: {
display: true
}
}
}
});
}
function resetCalculator() {
distanceInput.value = '';
fuelEfficiencyInput.value = '';
fuelTypeSelect.value = 'gasoline';
fuelPriceInput.value = '';
efficiencyUnitSelect.value = 'mpg';
distanceUnitSelect.value = 'miles';
distanceError.textContent = '';
fuelEfficiencyError.textContent = '';
fuelPriceError.textContent = '';
primaryResultDiv.textContent = '–';
gallonsOrLitersDiv.innerHTML = 'Fuel Consumed: –';
costPerDistanceDiv.innerHTML = 'Cost Per Distance Unit: –';
totalTripsDiv.innerHTML = 'Estimated Trips on Full Tank: –';
assumedFuelPriceDiv.innerHTML = 'Fuel Price: –';
assumedEfficiencyDiv.innerHTML = 'Fuel Efficiency: –';
assumedDistanceDiv.innerHTML = 'Distance: –';
updateTable('–', '–', '–', '–');
if (chart) {
chart.destroy();
chart = null;
}
chartContext = null; // Reset context
}
function copyResults() {
var primaryResult = primaryResultDiv.textContent;
var fuelConsumed = gallonsOrLitersDiv.textContent;
var costPerDistance = costPerDistanceDiv.textContent;
var estimatedTrips = totalTripsDiv.textContent;
var assumedFuelPrice = assumedFuelPriceDiv.textContent;
var assumedEfficiency = assumedEfficiencyDiv.textContent;
var assumedDistance = assumedDistanceDiv.textContent;
var resultsText = "— Fuel Cost Calculation Results —\n\n";
resultsText += "Primary Result: " + primaryResult + "\n";
resultsText += fuelConsumed + "\n";
resultsText += costPerDistance + "\n";
resultsText += estimatedTrips + "\n\n";
resultsText += "Key Assumptions:\n";
resultsText += assumedFuelPrice + "\n";
resultsText += assumedEfficiency + "\n";
resultsText += assumedDistance + "\n";
// Use a temporary textarea to copy to clipboard
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 to clipboard!' : 'Failed to copy results.';
console.log(msg);
// Optionally show a temporary message to the user
var copyButton = document.querySelector('button[onclick="copyResults()"]');
var originalText = copyButton.textContent;
copyButton.textContent = msg;
setTimeout(function() {
copyButton.textContent = originalText;
}, 2000);
} catch (err) {
console.log('Oops, unable to copy: ', err);
}
document.body.removeChild(textArea);
}
// Add event listeners for real-time updates
distanceInput.addEventListener('input', calculateFuelCost);
fuelEfficiencyInput.addEventListener('input', calculateFuelCost);
fuelTypeSelect.addEventListener('change', calculateFuelCost);
fuelPriceInput.addEventListener('input', calculateFuelCost);
efficiencyUnitSelect.addEventListener('change', calculateFuelCost);
distanceUnitSelect.addEventListener('change', calculateFuelCost);
// Initialize calculator on load
window.onload = function() {
resetCalculator(); // Set sensible defaults
// Optionally pre-fill with example values
// distanceInput.value = 500;
// fuelEfficiencyInput.value = 25;
// fuelPriceInput.value = 3.50;
// calculateFuelCost();
};
// FAQ toggle functionality
var faqQuestions = document.querySelectorAll('.faq-question');
faqQuestions.forEach(function(question) {
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var answer = this.nextElementSibling;
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} else {
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});
});
// Chart.js library is required for the chart.
// Since external libraries are not allowed, we'll use a placeholder or a very basic SVG/Canvas implementation.
// For this example, I'll assume Chart.js is available globally or provide a minimal canvas drawing.
// NOTE: The prompt explicitly forbids external libraries. A native canvas implementation is needed.
// Minimal native Canvas implementation for the chart
function drawBasicChart(canvasId, labels, data) {
var canvas = document.getElementById(canvasId);
if (!canvas) return;
var ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height); // Clear previous drawing
var chartWidth = canvas.clientWidth;
var chartHeight = canvas.clientHeight;
var padding = 40;
var chartAreaWidth = chartWidth – 2 * padding;
var chartAreaHeight = chartHeight – 2 * padding;
// Find max values for scaling
var maxValue = 0;
for (var i = 0; i
maxValue) {
maxValue = parseFloat(data[i]);
}
}
if (maxValue === 0) maxValue = 1; // Avoid division by zero
// Draw Axes
ctx.strokeStyle = '#ccc';
ctx.lineWidth = 1;
ctx.beginPath();
ctx.moveTo(padding, padding); // Top-left corner of chart area
ctx.lineTo(padding, chartHeight – padding); // Y-axis line
ctx.lineTo(chartWidth – padding, chartHeight – padding); // X-axis line
ctx.stroke();
// Draw Y-axis labels and ticks
ctx.fillStyle = '#666';
ctx.textAlign = 'right';
ctx.textBaseline = 'middle';
var numYTicks = 5;
for (var i = 0; i <= numYTicks; i++) {
var yPos = chartHeight – padding – (i * chartAreaHeight / numYTicks);
var labelValue = (i * maxValue / numYTicks).toFixed(0);
ctx.fillText(labelValue, padding – 10, yPos);
ctx.beginPath();
ctx.moveTo(padding – 5, yPos);
ctx.lineTo(padding, yPos);
ctx.stroke();
}
// Draw X-axis labels
ctx.textAlign = 'center';
ctx.textBaseline = 'top';
var numXLabels = labels.length;
for (var i = 0; i < numXLabels; i++) {
var xPos = padding + (i * chartAreaWidth / (numXLabels – 1));
ctx.fillText(labels[i], xPos, chartHeight – padding + 10);
}
// Draw the line graph
ctx.strokeStyle = 'var(–primary-color)';
ctx.lineWidth = 2;
ctx.beginPath();
for (var i = 0; i 0;
var fuelEfficiencyValid = parseFloat(fuelEfficiencyInput.value) > 0;
var fuelPriceValid = parseFloat(fuelPriceInput.value) >= 0;
if (!distanceValid || !fuelEfficiencyValid || !fuelPriceValid) {
// Clear canvas if inputs are invalid
var canvas = document.getElementById('fuelCostChart');
if (canvas) {
var ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height);
}
return;
}
var distances = [];
var costs = [];
var maxDistance = distance > 0 ? distance * 2 : 1000;
var step = maxDistance / 10;
for (var i = 0; i <= 10; i++) {
var currentDistance = step * i;
distances.push(currentDistance.toFixed(0));
var currentFuelConsumed = 0;
if (fuelType === 'electric') {
if (efficiencyUnit === 'kpl') {
currentFuelConsumed = currentDistance / fuelEfficiency;
} else { // lp100km or mpg equivalent
currentFuelConsumed = (currentDistance / 100) * fuelEfficiency;
}
} else {
if (efficiencyUnit === 'mpg') {
currentFuelConsumed = currentDistance / fuelEfficiency;
} else if (efficiencyUnit === 'kpl') {
currentFuelConsumed = currentDistance / fuelEfficiency;
} else { // lp100km
currentFuelConsumed = (currentDistance / 100) * fuelEfficiency;
}
}
var currentTotalCost = currentFuelConsumed * fuelPrice;
costs.push(currentTotalCost.toFixed(2));
}
drawBasicChart('fuelCostChart', distances, costs);
}
// Ensure initial chart draw on load if defaults are set
window.onload = function() {
resetCalculator();
// Set default values for demonstration if needed
distanceInput.value = 500;
fuelEfficiencyInput.value = 25;
fuelPriceInput.value = 3.50;
calculateFuelCost(); // Calculate with defaults
};