MPG / Gas Mileage Calculator
Compute your fuel economy from a fill-up: miles driven ÷ gallons used.
Ad · leaderboard
Inputs
$/gallon
$
Fuel economy
$29.17
8.1 L/100 km
Cost per mile
$0.12
Annual fuel cost (15k mi)
$1,800.00
MPG
29.17 mpg
Ad · rectangle
Ad · in-content
How it works
MPG = miles ÷ gallons. Cost per mile = price ÷ MPG. Annual cost assumes 15,000 miles per year.
Frequently asked questions
How do I measure MPG accurately?
Fill the tank, note the odometer, drive normally, then fill up again. Divide miles by gallons used to refill.
Why does MPG vary tank-to-tank?
Highway vs city driving, weather, tire pressure, cargo weight, and driving style all affect fuel economy.
Are the EPA numbers realistic?
The EPA numbers are lab-tested. Real-world MPG usually lands 10–20% below the sticker.
How does this compare to L/100 km?
L/100 km = 235.215 ÷ MPG. Lower is better in metric; higher is better in MPG.
What about hybrids?
Hybrids often exceed 40 MPG in city driving. Compare highway MPG when doing long road trips.
Related calculators
Ad · anchor