How To

How to Calculate Gas Mileage

By eHow Cars Editor

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In days of long commutes and climbing gas prices, consumers are taking note of how many miles per gallon (MPG) they're getting. New vehicles often come with a sticker indicating gas mileage, but that may not be accurate for your driving patterns. Follow these few simple steps to calculate the actual MPG for your new or used vehicle.

Instructions

Difficulty: Moderately Easy
Step1
Fill the gas tank completely. Write down the mileage on the odometer reading before leaving the gas station.
Step2
Create a log to record the mileage and number of gallons every time you fill up. Keep it in an easy to access place, such as the glove compartment.
Step3
Refill the tank to the top, when it's time to refuel, using the same grade of gasoline as was used during the initial fill. Log the number of gallons required to fill the tank and the odometer reading.
Step4
Subtract the previous odometer reading from the second to calculate the distance driven.
Step5
Calculate the miles per gallon by dividing the number of miles driven by the total gallons of gas it took to fill the tank the second time.

Tips & Warnings

  • Your vehicle will always see better gas mileage on highways and interstates than driving short distances at reduced speeds, such as in town.
  • Use a calculator for better accuracy.

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eHow Article: How to Calculate Gas Mileage

eHow Cars Editor

Category: Cars

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