Fuel Cost (MPG)
Work out the trip fuel cost in miles, using MPG and price per gallon.
miles
MPG
€/gallon
Total cost€14.29
Fuel used2.9 gallons
Cost per mile€0.14
Total distance100 miles
How it works
Drivers used to US or UK figures think in miles per gallon rather than litres per 100 km. This version works entirely in those units so you do not have to convert anything.
It divides the distance by your MPG to get the gallons used, then multiplies by the price per gallon. For a 250-mile trip at 35 MPG with fuel at $3.60 a gallon, that is about 7.1 gallons and roughly $25.70.
Remember that US and UK gallons differ (a UK gallon is about 20% larger), so make sure your MPG figure and price use the same gallon.
Frequently asked questions
Is this US or UK gallons?
It works with either, as long as you are consistent. A UK gallon is about 4.55 litres and a US gallon about 3.79 litres, so the MPG rating and the price must refer to the same one.
How do I convert MPG to L/100km?
For US MPG, divide 235.2 by the MPG figure. So 35 US MPG is about 6.7 L/100km. For the metric version of this tool, use the standard fuel cost calculator.
Are US and UK MPG the same?
No, the gallons differ. Choose the correct format for your data.