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Fuel Economy Calculator

Work out MPG, L/100km, cost per mile, and how far a full tank takes you.

Leave at 0 to calculate it from the fuel price.

Economy

0 mpg

Fuel used on this trip

0

Cost of this trip

$0

Range on a full tank

0 mi

L/100 km

-

km/L

-

Cost per mile / km

-

Annual cost at this rate

$0

A US gallon is 3.785 litres, and 1 mile is 1.609 km. MPG and L/100 km are not simple reciprocals: 30 MPG US is about 7.84 L/100 km, not 100/30. The cost per mile is what matters when you are deciding between vehicles.

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What Is Fuel Economy Calculator?

The Fuel Economy Calculator converts between MPG, L/100 km, and km/L, then works out the cost of a trip, the cost per mile, the range on a full tank, and what a year of driving costs.

Who Uses the Fuel Economy Calculator?

Drivers use it to compare vehicles on real running cost rather than the advertised figure, and to work out whether a longer journey is worth the extra fuel.

How to Use the Fuel Economy Calculator

  1. Enter the distance and fuel used, with the right units.
  2. Add the fuel price per gallon or litre.
  3. Read MPG, L/100km, cost per mile, range, and annual cost.

Why Choose Our Fuel Economy Calculator?

  • MPG, L/100km, and km/L side by side
  • Cost per mile and per kilometre
  • Range on a full tank and yearly cost

Try the Fuel Economy Calculator above — it is free, fast, and works on any device. Bookmark this page to return whenever you need it.