Calculate MPG

1. Fill up the gas tank, full and write down the mileage (13000).
2. Drive your vehicle until your gas goes down half tank.
3. Fill up the tank again and jot down the mileage(13150).
4. Subtract the mileage in #3 with the mileage in #1 (13150 - 13000 = 150 miles).
5. Divide the result by the number of gallons you put in the second time (#3). Example 150 miles/5 gallons = 30 MPG.
6. Your MPG is 30, meaning 1 gallon of gas/30 miles.