Calculate your vehicle's fuel efficiency by entering miles driven and gallons consumed
Learn how to use the Miles Per Gallon Calculator and understand fuel efficiency measurements
Miles Per Gallon (MPG) is a measure of a vehicle's fuel efficiency. It indicates how many miles a vehicle can travel per one gallon of fuel. Higher MPG values indicate better fuel efficiency (more miles per gallon).
This calculator converts between US gallons to liters (1 gallon = 3.78541 liters) and miles to kilometers (1 mile = 1.60934 kilometers). The results are provided in both US customary units (MPG) and metric units (km/l).
If you drove 300 miles and used 10 gallons of fuel, your vehicle's MPG would be:
MPG = 300 miles ÷ 10 gallons = 30 MPG