Planning a road trip? Use this calculator to estimate exactly how much fuel you will need and what it will cost. Works for miles per gallon (MPG) or kilometres per litre.
Gas Mileage & Trip Cost Calculator
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How to Use This Calculator
Enter the trip distance, your car’s fuel efficiency, and the current fuel price per gallon/litre.
- Distance — total trip distance in miles or km.
- Fuel Efficiency — your car’s MPG or km/L (check your car manual).
- Fuel Price — cost per gallon or litre at the pump.
Frequently Asked Questions
Where do I find my car’s MPG?
Check your car’s manual, the manufacturer’s website, or use a site like fueleconomy.gov (US) or the DVLA (UK).
How do I convert L/100km to MPG?
Divide 235.2 by your L/100km figure to get MPG.
Is the Gas Mileage & Trip Cost Calculator accurate for city driving?
The Gas Mileage & Trip Cost Calculator relies on the MPG you enter. Be sure to use your car’s city MPG if you are not driving on the highway.
Can I use the Gas Mileage & Trip Cost Calculator for road trips?
Yes! The Gas Mileage & Trip Cost Calculator is the perfect tool for splitting road trip fuel costs among friends.
Does the Gas Mileage & Trip Cost Calculator account for tolls?
This specific Gas Mileage & Trip Cost Calculator focuses purely on fuel costs based on distance and efficiency.