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About the Gas Mileage Calculator
This calculator computes your vehicle's gas mileage as miles per gallon. Enter the distance you drove and the fuel you used, and it returns your fuel efficiency in MPG. The result shows how far your car travels on one gallon of gas.
The tool uses the standard formula MPG = distance traveled divided by gallons of fuel consumed. It needs two inputs: miles driven since the last fill-up and the gallons pumped at that fill-up. For accurate results, fill the tank completely each time and record the exact pump amount. Starting with a full tank keeps the comparison fair.
- Write down your odometer reading or reset the trip meter when you fill up.
- At the next fill-up, note the miles driven and the gallons added.
- Enter both numbers and calculate to see your MPG.