Calculate Gas Consumption

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Gas Consumption Calculator

Trip Summary:

Fuel Economy: L/100 km

Total Fuel Cost:

Cost per Kilometer:

function calculateGasUsage() { var distance = parseFloat(document.getElementById('tripDistance').value); var fuel = parseFloat(document.getElementById('fuelUsed').value); var price = parseFloat(document.getElementById('fuelPrice').value); var resultArea = document.getElementById('gasResultArea'); if (isNaN(distance) || isNaN(fuel) || distance <= 0 || fuel 0) { totalCost = fuel * price; costPerKm = totalCost / distance; } document.getElementById('economyResult').innerText = economy.toFixed(2); document.getElementById('totalCostResult').innerText = price > 0 ? '$' + totalCost.toFixed(2) : 'N/A'; document.getElementById('costPerKmResult').innerText = price > 0 ? '$' + costPerKm.toFixed(4) : 'N/A'; resultArea.style.display = 'block'; }

Understanding Vehicle Gas Consumption

Calculating your vehicle's gas consumption is an essential skill for any driver. Whether you are planning a long road trip, budgeting for monthly expenses, or monitoring your vehicle's health, knowing how much fuel your car sips per kilometer provides valuable data. Fuel efficiency is typically measured in Liters per 100 Kilometers (L/100km) in metric systems or Miles per Gallon (MPG) in imperial systems.

The Formula for Fuel Efficiency

To calculate the standard metric for fuel economy (L/100km), use the following mathematical formula:

Efficiency = (Fuel Consumed / Distance Traveled) × 100

Step-by-Step Guide to Measuring Your Gas Usage

  1. Fill Your Tank: Visit a gas station and fill your tank until the pump clicks off automatically. Reset your "Trip A" or "Trip B" odometer to zero.
  2. Drive Normally: Go about your daily commute or complete your planned trip until you need to refuel.
  3. Refill and Record: Go back to the pump. Note the number of liters shown on the pump required to fill the tank again. This is your Fuel Consumed.
  4. Check the Odometer: Note the distance traveled on your trip meter. This is your Distance Traveled.
  5. Calculate: Input those numbers into the calculator above to get your average fuel consumption.

Realistic Example

Imagine you drove from one city to another, covering 450 kilometers. At the end of the trip, you stopped at a gas station and it took 32 liters of fuel to top up the tank. If the gas price was $1.65 per liter, your results would be:

  • Fuel Economy: (32 / 450) × 100 = 7.11 L/100 km
  • Total Cost: 32 × $1.65 = $52.80
  • Cost per km: $52.80 / 450 = $0.117 per kilometer

Why Track Your Fuel Consumption?

Monitoring your gas consumption isn't just about saving money at the pump. A sudden spike in fuel usage can be an early warning sign of mechanical issues, such as:

  • Low tire pressure increasing rolling resistance.
  • Clogged air filters restricting engine airflow.
  • Faulty oxygen sensors or spark plugs.
  • Sticking brake calipers.

By keeping a log of your L/100km results using this tool, you can maintain your vehicle's peak performance and reduce your environmental footprint.

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