# Calculating MPG

## Odometer Method MPG can be calculated in four easy steps:

 Step 1. Filling the vehicle’s gas tank completely and writing down the vehicle’s odometer reading (mileage). Example: The last time the tank was filled, the odometer reading was 32,645.1 miles.
 Step 2. When it’s time to refuel, filling the tank completely and writing down the number of gallons it took to fill the tank and the vehicle’s new odometer reading. Once two odometer readings are taken, MPG can be calculated. Example: The next time the tank was filled, the odometer reading was 33,001.3. It took 13.5 gallons to fill the tank.

 Step 3. Calculating the distance driven by subtracting the previous odometer reading from the new one. Example: The distance driven would be 33,001.3 minus 32,645.1, or 356.2 miles.
 Step 4. Dividing the number of miles driven by the number of gallons it took to fill the tank. The result is the vehicle’s MPG for that driving period. Example: 356.2 miles divided by 13.5 gallons equals 26.4 miles per gallon. The MPG for that driving period would be 26.4.
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