Gas Mileage Calculator

Calculate your car's fuel efficiency by entering two odometer readings and the amount of fuel added to your tank during that interval.

miles
miles
gallons
$per gallon
kilometers
kilometers
liters
$per liter

How to Improve Gas Mileage

  1. Drive Efficiently: Avoid aggressive driving. Smooth acceleration and braking can improve mileage by 15-30%.
  2. Maintain Optimal Speed: For most gas vehicles, fuel efficiency peaks around 55 MPH (90 km/h). Using cruise control on highways helps maintain a constant speed.
  3. Check Your Tires: Properly inflated tires can improve gas mileage by up to 3%. Ensure they are inflated to the pressure recommended by your car's manufacturer.
  4. Reduce Weight: Remove unnecessary heavy items from your car. The lighter the vehicle, the less energy is required to move it.
  5. Improve Aerodynamics: Open windows and roof racks increase drag, especially at highway speeds. Roll up windows to reduce resistance.
  6. Avoid Unnecessary Idling: An idling car gets 0 MPG. Turn off the engine if you're stopped for more than a minute.
  7. Keep Your Vehicle Tuned: Regular maintenance, such as using the recommended motor oil and replacing clogged air filters, keeps your engine running efficiently.