A gas mileage (fuel efficiency) calculator computes your vehicle's actual fuel consumption by dividing the distance driven by the fuel used.
About this calculator
A gas mileage (fuel efficiency) calculator computes your vehicle's actual fuel consumption by dividing the distance driven by the fuel used. It shows results in both km per litre (km/L) and litres per 100 km (L/100km), which are the two standard efficiency metrics used internationally.
Tracking fuel efficiency can help you spot engine or tyre issues early, compare real-world results with manufacturer claims, and adjust your driving habits.
Common uses
- Track actual fuel efficiency after every fill-up
- Detect engine or tyre problems through fuel consumption changes
- Compare real-world mileage vs manufacturer's claimed efficiency
- Calculate annual fuel costs based on typical monthly driving
Frequently asked questions
What is a good fuel efficiency for a car?
For Indian conditions: economy hatchbacks typically achieve 18–25 km/L, mid-size sedans 14–18 km/L, SUVs 12–16 km/L, and diesel vehicles generally get 15–30% better mileage than petrol equivalents. Hybrids achieve 20–30+ km/L in city driving.