Car Mileage Calculator
Car & BikeWork out real mileage from a tank, and compare it to the claimed figure.
Runs entirely in your browser — nothing is uploaded
Features
- km/l, km/kg for CNG or km/kWh for electric.
- Cost per kilometre at the current fuel price.
- Compares against the manufacturer's claim.
- Runs entirely in your browser — nothing you enter is uploaded.
How to use the Car Mileage Calculator
- 1Fill the tank and reset the trip meter.
- 2Drive normally, then fill to the same level again.
- 3Enter the distance and the fuel it took.
Frequently asked questions
How do I measure mileage accurately?
Fill to the automatic cut-off, reset the trip meter, drive normally, then fill to the cut-off at the same pump. The fuel added is what the distance consumed. One tank is noisy — average three consecutive tanks for a figure you can rely on.
Why is my mileage lower than advertised?
Advertised figures come from a standardised laboratory cycle with no traffic, no air conditioning and gentle acceleration. Real driving runs 15–30% below, and heavy city traffic can halve it. A gap of that size is normal, not a fault.
What improves mileage?
Correct tyre pressure, which is the cheapest and most overlooked; steady speeds around 60–80 km/h; anticipating traffic instead of braking hard; removing roof carriers and unnecessary weight; and keeping air and fuel filters serviced.
How do I compare petrol, diesel, CNG and electric?
Not by mileage — the units differ. Compare cost per kilometre, which the tool shows: divide the price per unit by the distance that unit covers. That is the only fair comparison across fuel types.