How to Calculate Gas Mileage

Calculating your gas mileage (MPG) is easy with just a few simple steps.

1) Start by filling your vehicle's gas tank completely and write down your odometer mileage reading.

2) The next time you re-fuel, write down the number of gallons of fuel it took to fill your gas tank comletely along with your new odometer mileage reading.

3) Calculate your total miles driven by subtracting your first odometer mileage reading from your second odometer mileage reading.

4) Divide the number of miles driven by the number of gallons it took to fill your tank and your result is your car's gas mileage MPG. (total miles / gallons = MPG)

It's as simple as that! All you need is a notepad and calculator and you can even use your trip odometer to save a step in calculating your total miles driven.