Gas Mileage (MPG) Calculator
Fill the tank, drive, then fill it again. Enter the distance you covered and the fuel it took to refill, and the calculator gives your fuel economy in every common unit.
Type a number and the answer appears straight away.
Fuel economy28 mpg
- Miles per US gallon
- 28
- Liters per 100 km
- 8.4
- Kilometers per liter
- 11.9
- Miles per imperial (UK) gallon
- 33.6
- Range on a 14 gallon (53 L) tank
- 392 miles (631 km)
For the most reliable figure, fill the tank to the first click both times and average over several tanks.
The math behind it: Gas Mileage (MPG)
mpg = miles driven / gallons used; L/100 km = 235.21 / mpg
Driving 350 miles on 12.5 gallons is 28 miles per gallon, which is 8.4 liters per 100 km. For a reliable figure, fill to the first click of the pump both times and average over several tanks.
Common questions
How do I calculate gas mileage?
Divide the miles driven by the gallons of fuel used. 350 miles on 12.5 gallons is 350 / 12.5 = 28 mpg.
What is good gas mileage?
For a gasoline car, around 30 mpg or better is good, and hybrids often manage 45 to 55 mpg. Larger SUVs and trucks are typically in the high teens to mid 20s.
How do I convert mpg to liters per 100 km?
Divide 235.21 by the miles per US gallon. 28 mpg is 8.4 L/100 km. Our fuel consumption converter converts in either direction.
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