What is the difference between MPG and L/100km?

MPG (miles per gallon) measures how far you travel per unit of fuel—higher is better. L/100km measures how much fuel you consume per 100 km of travel—lower is better. They are inversely related.

How do I calculate my MPG?

Fill up your tank, reset your trip meter, drive until the next fill-up, then enter the miles driven and gallons used. The calculator divides miles by gallons to give you your MPG.

What is the average car MPG?

The US average for new cars is around 30 MPG combined (city/highway). The calculator uses 30 MPG as a benchmark to show how your vehicle compares.

Can I calculate fuel cost for a road trip?

Yes. Enter the trip distance, your car's fuel efficiency, and the current fuel price. The calculator will show the estimated total fuel cost for that trip.

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Mileage Calculator

Calculate fuel efficiency in MPG, L/100km, or km/L with cost projections.

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About this tool

The Mileage Calculator helps you understand your vehicle's fuel efficiency and project fuel costs. Enter the distance traveled and fuel consumed to calculate efficiency in MPG (miles per gallon), L/100km, or km/L—switch between modes with one click. You can also input fuel price to get an estimated monthly and yearly fuel cost based on your average mileage. A built-in comparison shows how your efficiency stacks up against the average car benchmark of 30 MPG, helping you decide whether it's time for a more fuel-efficient vehicle.

How to use

1 Select your preferred efficiency unit: MPG, L/100km, or km/L.
2 Enter the distance traveled in the Distance field.
3 Enter the amount of fuel used in the Fuel Used field.
4 Your fuel efficiency is displayed immediately.
5 Enter your average monthly mileage and fuel price for cost projections.
6 Check the comparison bar to see how you rate against the 30 MPG benchmark.

Frequently Asked Questions

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