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Fuel cost calculator

Enter the distance, your vehicle's fuel economy and the price per gallon. You see how much fuel you need and what the trip costs.

Fuel economy goes in miles per gallon, as on the window sticker.

How it's calculated

Gallons = distance ÷ miles per gallon.
Cost = gallons × price per gallon. A round trip doubles the distance.

An example

A 150-mile trip there and back in a car that does 30 mpg uses 10 gallons.

At $750 a gallon, that is $7,500. Split between 2 people, $3,750 each.

Frequently asked questions

How do I convert mpg to litres per 100 km?

Divide 235.2 by the mpg (US gallons). A car that does 30 mpg uses about 7.8 litres per 100 km.

Does it include tolls?

No. It only covers fuel. Add tolls and parking separately.

Why does my car use more fuel in town?

Stopping and starting takes more energy than steady highway driving, so city economy is usually worse.

Key terms

Fuel economy: How far a vehicle goes on a given amount of fuel.
mpg: Miles per gallon. The higher, the better.

The same calculation in other countries

Up-to-date official data

We check the official sources automatically, every day.

See all sources

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