.fuel-efficiency-calculator-container {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
max-width: 700px;
margin: 20px auto;
padding: 25px;
border: 1px solid #e0e0e0;
border-radius: 10px;
background-color: #f9f9f9;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
.fuel-efficiency-calculator-container h2 {
color: #2c3e50;
text-align: center;
margin-bottom: 25px;
font-size: 1.8em;
}
.fuel-efficiency-calculator-container .input-group {
margin-bottom: 18px;
display: flex;
flex-direction: column;
}
.fuel-efficiency-calculator-container .input-group label {
margin-bottom: 8px;
color: #34495e;
font-weight: bold;
font-size: 1.05em;
}
.fuel-efficiency-calculator-container .input-field-wrapper {
display: flex;
align-items: center;
gap: 10px;
}
.fuel-efficiency-calculator-container input[type="number"],
.fuel-efficiency-calculator-container select {
flex-grow: 1;
padding: 12px;
border: 1px solid #ccc;
border-radius: 6px;
font-size: 1em;
box-sizing: border-box;
transition: border-color 0.3s ease;
}
.fuel-efficiency-calculator-container input[type="number"]:focus,
.fuel-efficiency-calculator-container select:focus {
border-color: #007bff;
outline: none;
box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}
.fuel-efficiency-calculator-container button {
display: block;
width: 100%;
padding: 14px;
background-color: #28a745;
color: white;
border: none;
border-radius: 6px;
font-size: 1.1em;
font-weight: bold;
cursor: pointer;
transition: background-color 0.3s ease, transform 0.2s ease;
margin-top: 25px;
}
.fuel-efficiency-calculator-container button:hover {
background-color: #218838;
transform: translateY(-1px);
}
.fuel-efficiency-calculator-container .result-section {
margin-top: 30px;
padding: 20px;
background-color: #e9f7ef;
border: 1px solid #d4edda;
border-radius: 8px;
text-align: center;
font-size: 1.1em;
color: #155724;
}
.fuel-efficiency-calculator-container .result-section p {
margin: 8px 0;
line-height: 1.6;
}
.fuel-efficiency-calculator-container .result-section strong {
color: #0a3622;
font-size: 1.2em;
}
.fuel-efficiency-calculator-container .error-message {
color: #dc3545;
margin-top: 10px;
text-align: center;
font-weight: bold;
}
/* Article Styling */
.fuel-efficiency-article {
margin-top: 40px;
padding-top: 30px;
border-top: 1px solid #e0e0e0;
color: #333;
line-height: 1.7;
}
.fuel-efficiency-article h3 {
color: #2c3e50;
margin-top: 25px;
margin-bottom: 15px;
font-size: 1.5em;
}
.fuel-efficiency-article p {
margin-bottom: 15px;
}
.fuel-efficiency-article ul {
list-style-type: disc;
margin-left: 20px;
margin-bottom: 15px;
}
.fuel-efficiency-article ul li {
margin-bottom: 8px;
}
function calculateFuelEfficiency() {
var distanceTraveled = parseFloat(document.getElementById('distanceTraveled').value);
var fuelConsumed = parseFloat(document.getElementById('fuelConsumed').value);
var distanceUnit = document.getElementById('distanceUnit').value;
var fuelUnit = document.getElementById('fuelUnit').value;
var resultDiv = document.getElementById('fuelEfficiencyResult');
var errorDiv = document.getElementById('fuelEfficiencyError');
resultDiv.style.display = 'none';
errorDiv.style.display = 'none';
errorDiv.innerHTML = ";
if (isNaN(distanceTraveled) || distanceTraveled <= 0) {
errorDiv.innerHTML = 'Please enter a valid distance traveled (must be a positive number).';
errorDiv.style.display = 'block';
return;
}
if (isNaN(fuelConsumed) || fuelConsumed <= 0) {
errorDiv.innerHTML = 'Please enter a valid amount of fuel consumed (must be a positive number).';
errorDiv.style.display = 'block';
return;
}
// Conversion constants
var MILES_TO_KM = 1.60934;
var US_GALLONS_TO_LITERS = 3.78541;
// Normalize to Kilometers and Liters for base calculations
var distanceInKm;
if (distanceUnit === 'miles') {
distanceInKm = distanceTraveled * MILES_TO_KM;
} else {
distanceInKm = distanceTraveled;
}
var fuelInLiters;
if (fuelUnit === 'gallons') {
fuelInLiters = fuelConsumed * US_GALLONS_TO_LITERS;
} else {
fuelInLiters = fuelConsumed;
}
// Calculate different efficiency metrics
var kmPerLiter = distanceInKm / fuelInLiters;
var litersPer100Km = (fuelInLiters / distanceInKm) * 100;
// Convert back to Miles and Gallons for MPG
var distanceInMiles = distanceInKm / MILES_TO_KM;
var fuelInGallons = fuelInLiters / US_GALLONS_TO_LITERS;
var mpg = distanceInMiles / fuelInGallons;
resultDiv.innerHTML =
'Your Fuel Efficiency:' +
'' + mpg.toFixed(2) + ' MPG (Miles per Gallon)' +
'' + kmPerLiter.toFixed(2) + ' km/L (Kilometers per Liter)' +
'' + litersPer100Km.toFixed(2) + ' L/100km (Liters per 100 Kilometers)';
resultDiv.style.display = 'block';
}
Fuel Efficiency Calculator
Miles
Kilometers
Gallons (US)
Liters
Understanding Fuel Efficiency
Fuel efficiency is a measure of how much distance a vehicle can travel per unit of fuel consumed. It's a critical metric for drivers, impacting both their wallets and the environment. A higher fuel efficiency means your vehicle uses less fuel to cover the same distance, leading to lower running costs and reduced carbon emissions.
Why Calculate Your Vehicle's Fuel Efficiency?
- Cost Savings: Knowing your vehicle's efficiency helps you estimate fuel expenses and identify opportunities to save money.
- Performance Monitoring: A sudden drop in fuel efficiency can indicate a mechanical issue with your vehicle, such as a clogged air filter, worn spark plugs, or underinflated tires.
- Environmental Impact: Better fuel efficiency means a smaller carbon footprint, contributing to cleaner air and a healthier planet.
- Informed Decisions: When buying a new vehicle, comparing fuel efficiency ratings can help you make an economically and environmentally sound choice.
How is Fuel Efficiency Calculated?
The basic principle of calculating fuel efficiency involves dividing the distance traveled by the amount of fuel consumed. However, the units used can vary significantly depending on your region:
- Miles Per Gallon (MPG): Common in the United States and the UK, this measures how many miles your vehicle can travel on one gallon of fuel. A higher MPG indicates better efficiency.
- Kilometers Per Liter (km/L): Used in many countries, this metric shows the number of kilometers traveled per liter of fuel. Again, a higher km/L means better efficiency.
- Liters Per 100 Kilometers (L/100km): Popular in Europe, Canada, Australia, and other regions, this measures how many liters of fuel are needed to travel 100 kilometers. In this case, a lower L/100km value indicates better efficiency.
Example Calculation:
Let's say you drove 450 miles and used 15 US gallons of fuel.
- MPG: 450 miles / 15 gallons = 30 MPG
If you drove 600 kilometers and used 40 liters of fuel:
- km/L: 600 km / 40 liters = 15 km/L
- L/100km: (40 liters / 600 km) * 100 = 6.67 L/100km
Our calculator above handles these conversions automatically, providing you with all three common metrics.
Factors Affecting Fuel Efficiency
Several factors can influence your vehicle's fuel efficiency:
- Driving Style: Aggressive driving (rapid acceleration, hard braking) significantly reduces efficiency compared to smooth, consistent driving.
- Vehicle Maintenance: Regular maintenance, including proper tire inflation, clean air filters, and regular oil changes, can improve efficiency.
- Road Conditions: Stop-and-go city traffic consumes more fuel than steady highway driving. Hills and rough terrain also increase fuel consumption.
- Vehicle Load: Carrying heavy loads or using roof racks increases aerodynamic drag and weight, leading to lower efficiency.
- Tire Pressure: Underinflated tires increase rolling resistance, forcing the engine to work harder.
- Aerodynamics: Vehicle design, open windows at high speeds, and external attachments can affect air resistance.
- Engine Size and Type: Generally, smaller engines are more fuel-efficient, and hybrid or electric vehicles offer superior efficiency.
Tips to Improve Your Fuel Efficiency
Want to get more out of every tank? Consider these tips:
- Drive Smoothly: Avoid sudden acceleration and braking. Maintain a consistent speed.
- Observe Speed Limits: Fuel efficiency typically decreases significantly at speeds above 50-60 mph (80-95 km/h).
- Maintain Your Vehicle: Keep your tires properly inflated, get regular oil changes, and replace air filters as recommended.
- Reduce Weight: Remove unnecessary items from your trunk or back seat.
- Limit Idling: If you're going to be stopped for more than 30 seconds, it's often more fuel-efficient to turn off your engine.
- Use Cruise Control: On highways, cruise control helps maintain a steady speed, optimizing fuel use.
- Plan Your Routes: Combine errands into one trip to reduce cold starts and minimize driving distance.
- Avoid Excessive Air Conditioning: While necessary in hot weather, overuse of AC can increase fuel consumption.
Use the calculator above to track your vehicle's fuel efficiency over time and see how these tips impact your results!