Fuel Efficiency Calculator
Convert between MPG, L/100km, and km/L — and calculate your fuel cost per trip.
Convert Efficiency
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About Fuel Efficiency
What is the difference between MPG and L/100km?
MPG (miles per gallon) measures how far you can travel on one gallon of fuel — higher is better. L/100km measures how many liters you use per 100 kilometers — lower is better. They are inverse measurements of the same thing.
What is considered good fuel efficiency?
For gasoline cars, 30+ MPG is considered good. Hybrid vehicles often achieve 45–60 MPG. Electric vehicles don't use fuel but are rated in MPGe (miles per gallon equivalent).