How can I calculate my gas mileage?

Here are four quick steps to calculate your MPG:

1. Fill your vehicle's fuel tank and record the odometer mileage.
2. Drive your vehicle as you normally do.
3. Refill the fuel tank. Record the odometer mileage again, as well as the gallons of fuel used.
4. Subtract the first mileage number from the second number to know how many miles were driven. Divide the number of miles driven by the number of gallons of fuel used. This is your approximate MPG.