The free Fuel Cost Calculator
Calculate the fuel needed and the cost of any trip. Supports miles or kilometres, MPG (US/UK), km/L and L/100 km, round trips and splitting between.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Illustration. Open the tool for the real thing.
What is the Fuel Cost Calculator?
Before a road trip or a commute change, it helps to know what the fuel will cost. Enter the distance, your car’s fuel efficiency and the price of fuel and this calculator shows how much fuel you will use and what it will cost, one way or as a round trip, and how much each passenger pays if you share.
It understands the different ways drivers measure efficiency — miles per gallon (US and UK gallons), kilometres per litre and litres per 100 kilometres — and lets you enter distance in miles or kilometres and fuel price per litre or per gallon, so you do not have to convert anything by hand.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Miles or kilometres, MPG (US/UK), km/L and L/100 km.
Double the trip with one tick.
Shows the cost per person for carpools.
See the cost of each mile or kilometre.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This calculator | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
How do I calculate fuel cost for a trip?
Divide the distance by your efficiency to get fuel used, then multiply by the fuel price.
What is L/100 km?
Litres of fuel used per 100 kilometres — lower is better.
How do I convert MPG to L/100 km?
Divide 235.2 by the MPG (US) figure; the calculator does it automatically.
Does it work for electric cars?
You can use kWh per 100 km as the “litres” and the electricity price as the fuel price.
Can I split the cost?
Yes, enter the number of passengers.
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