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Gas Mileage Calculator

Calculate your car's fuel efficiency.

Everyday
Gas Mileage (MPG) Calculator
Calculate your vehicle's fuel efficiency.

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Track Your Vehicle's Fuel Efficiency

Monitor your vehicle's performance and fuel costs with this MPG Calculator. By entering the distance you traveled since your last fill-up and the amount of gas you just put in, this tool calculates your car's fuel efficiency in miles per gallon (MPG). It's a great way to monitor your vehicle's health and budget for fuel expenses.

The MPG Formula Explained

Miles Per Gallon (MPG) = Miles Driven / Gallons of Gas Used

How to Use the Calculator

The best way to use this calculator is to follow these steps:

  1. Fill up your car's gas tank completely and reset your trip odometer to zero.
  2. Drive your car as you normally would until the tank is nearly empty.
  3. Go back to the gas station and fill the tank completely again. Note the number of gallons it took to fill the tank.
  4. Note the number of miles on your trip odometer.
  5. Enter the Miles Driven and Gas Used (gallons) into the calculator.

Real-World Example

After resetting your trip odometer at your last fill-up, you drive until your next one. The trip odometer reads 350 miles. It takes 12.5 gallons to fill the tank completely.

  • Miles Driven: 350
  • Gas Used: 12.5
  • Calculation: MPG = 350 / 12.5 = 28
  • Your car's fuel efficiency for that tank was 28 MPG.

Frequently Asked Questions (FAQ)

  • Why is my MPG lower than the manufacturer's rating? The official MPG ratings are achieved in highly controlled lab conditions. Real-world MPG is almost always lower due to factors like driving style (aggressive acceleration, speeding), traffic conditions, tire pressure, and use of air conditioning.
  • How can I improve my MPG? You can improve fuel efficiency by ensuring your tires are properly inflated, avoiding rapid acceleration and hard braking, removing unnecessary weight from your car, and performing regular maintenance like oil changes and air filter replacements.
  • Does this calculator work for kilometers and liters? This calculator is set up for miles and gallons. The equivalent metric measurement is 'liters per 100 kilometers' (L/100km).