About this gas mileage calculator
Fill the tank, reset the trip meter, and at the next fill-up divide the distance by the fuel it took: 320 miles on 11.5 gallons is 27.8 MPG, or 8.45 L/100 km. Add the fuel price to get the cost per mile.
MPG
Gas Mileage Calculator
Details
How to use Gas Mileage Calculator
What the tool does, how to run it, and what to expect from the result.
At a glance
Who Gas Mileage Calculator is for
A quick way to understand who this helps, what it solves, and where it connects next.
Best fit
Students, teachers and anyone checking a calculation.
Ideal for
Using the gas mileage calculator without installing anything or signing up.
FAQ
Common questions
Short answers for the questions people usually have before trying a utility like this.
How do I calculate MPG?
Miles driven ÷ gallons used to refill. Filling to the same point each time gives the most consistent number.
How do I convert MPG to L/100 km?
L/100 km = 235.21 ÷ MPG (US gallons). 30 MPG is 7.84 L/100 km.
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