Gas Calculation

Fuel Cost & Consumption Calculator

Miles Kilometers
MPG L/100km
$/Gallon $/Liter

Results:

Total Fuel Cost: –

Fuel Consumed: –

function calculateGas() { var distance = parseFloat(document.getElementById("distance").value); var distanceUnit = document.getElementById("distanceUnit").value; var fuelEfficiency = parseFloat(document.getElementById("fuelEfficiency").value); var fuelEfficiencyUnit = document.getElementById("fuelEfficiencyUnit").value; var fuelPrice = parseFloat(document.getElementById("fuelPrice").value); var fuelPriceUnit = document.getElementById("fuelPriceUnit").value; if (isNaN(distance) || isNaN(fuelEfficiency) || isNaN(fuelPrice) || distance <= 0 || fuelEfficiency <= 0 || fuelPrice <= 0) { document.getElementById("totalFuelCostOutput").innerHTML = "Total Fuel Cost: Please enter valid positive numbers for all fields."; document.getElementById("fuelConsumedOutput").innerHTML = "Fuel Consumed: -"; return; } // Conversion factors var GALLONS_TO_LITERS = 3.78541; var MILES_TO_KILOMETERS = 1.60934; // Step 1: Convert distance to Kilometers var distanceInKm; if (distanceUnit === "Miles") { distanceInKm = distance * MILES_TO_KILOMETERS; } else { // Kilometers distanceInKm = distance; } // Step 2: Convert fuel efficiency to Liters per 100 Kilometers (L/100km) var efficiencyInL_per_100km; if (fuelEfficiencyUnit === "MPG") { // MPG to L/100km: (100 km / (MPG * 1.60934 km/mile)) * (3.78541 L/gallon) // Simplified: (378.541 / (MPG * 1.60934)) efficiencyInL_per_100km = (GALLONS_TO_LITERS * 100) / (fuelEfficiency * MILES_TO_KILOMETERS); } else { // L/100km efficiencyInL_per_100km = fuelEfficiency; } // Step 3: Convert fuel price to price per Liter var pricePerLiter; if (fuelPriceUnit === "$/Gallon") { pricePerLiter = fuelPrice / GALLONS_TO_LITERS; } else { // $/Liter pricePerLiter = fuelPrice; } // Step 4: Calculate fuel consumed in Liters var fuelConsumedLiters = (distanceInKm / 100) * efficiencyInL_per_100km; // Step 5: Calculate total fuel cost var totalFuelCost = fuelConsumedLiters * pricePerLiter; // Display results document.getElementById("totalFuelCostOutput").innerHTML = "Total Fuel Cost: $" + totalFuelCost.toFixed(2); document.getElementById("fuelConsumedOutput").innerHTML = "Fuel Consumed: " + fuelConsumedLiters.toFixed(2) + " Liters (" + (fuelConsumedLiters / GALLONS_TO_LITERS).toFixed(2) + " Gallons)"; }

Understanding Your Fuel Costs and Consumption

Whether you're planning a road trip, budgeting for your daily commute, or simply curious about your vehicle's efficiency, understanding fuel costs and consumption is essential. Our Fuel Cost & Consumption Calculator provides a quick and easy way to estimate how much fuel you'll use and what it will cost you, regardless of the units you prefer to use.

How the Calculator Works

This calculator takes three primary inputs to give you an accurate estimate:

  • Distance Traveled: This is the total length of your journey or the distance you expect to drive. You can input this value in either Miles or Kilometers.
  • Vehicle Fuel Efficiency: This represents how far your vehicle can travel on a given amount of fuel. You can input this as Miles Per Gallon (MPG) or Liters per 100 Kilometers (L/100km).
  • Fuel Price: This is the cost of fuel per unit in your local area. You can enter this as Dollars per Gallon ($/Gallon) or Dollars per Liter ($/Liter).

The calculator then performs the necessary conversions and calculations to provide you with the total estimated fuel cost and the total volume of fuel consumed for your specified trip.

Understanding the Results

  • Total Fuel Cost: This is the estimated monetary expense for the fuel required for your journey. It's presented in dollars.
  • Fuel Consumed: This indicates the total volume of fuel your vehicle is expected to use for the given distance. It's displayed in both Liters and Gallons for comprehensive understanding.

Formulas Used

The calculator uses the following fundamental principles, with internal conversions to ensure accuracy across different unit systems:

  1. Fuel Consumed (in Liters):
    Fuel Consumed (L) = (Distance in Kilometers / 100) * Fuel Efficiency (L/100km)
    If inputs are in MPG, they are first converted to L/100km. If distance is in Miles, it's converted to Kilometers.
  2. Total Fuel Cost:
    Total Cost = Fuel Consumed (L) * Fuel Price (per Liter)
    If the fuel price is per Gallon, it's first converted to price per Liter.

Realistic Examples

Example 1: US Customary Units

  • Distance Traveled: 500 Miles
  • Vehicle Fuel Efficiency: 30 MPG
  • Fuel Price: $3.80 / Gallon

Calculation:
Fuel Consumed = 500 Miles / 30 MPG = 16.67 Gallons
Total Fuel Cost = 16.67 Gallons * $3.80/Gallon = $63.35
(The calculator will also show this in Liters)

Example 2: Metric Units

  • Distance Traveled: 800 Kilometers
  • Vehicle Fuel Efficiency: 7.5 L/100km
  • Fuel Price: $1.75 / Liter

Calculation:
Fuel Consumed = (800 km / 100 km) * 7.5 L/100km = 8 * 7.5 L = 60 Liters
Total Fuel Cost = 60 Liters * $1.75/Liter = $105.00
(The calculator will also show this in Gallons)

Factors Affecting Fuel Consumption

While this calculator provides a solid estimate, actual fuel consumption can vary due to several factors:

  • Driving Habits: Aggressive driving (rapid acceleration, hard braking) significantly reduces efficiency.
  • Vehicle Maintenance: Poorly maintained engines, underinflated tires, or dirty air filters can increase fuel usage.
  • Terrain and Road Conditions: Driving uphill, on rough roads, or in heavy traffic consumes more fuel.
  • Weather Conditions: Cold weather, strong headwinds, or using air conditioning can impact efficiency.
  • Vehicle Load: Carrying heavy loads or using roof racks increases aerodynamic drag and fuel consumption.

Tips for Improving Fuel Efficiency

  • Maintain Your Vehicle: Regular tune-ups, oil changes, and keeping tires properly inflated can save fuel.
  • Drive Smoothly: Avoid sudden acceleration and braking. Maintain a steady speed.
  • Reduce Weight: Remove unnecessary items from your vehicle.
  • Limit Idling: Turn off your engine if you're going to be stopped for more than a minute.
  • Use Cruise Control: On highways, cruise control can help maintain a consistent speed and improve efficiency.

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