Mileage Calculator

km
km
litres
Optional — Fuel Cost & Range
/ L
Leave blank to skip cost calculation.
L
For full-tank range estimate.
km/mo
For monthly/annual running cost estimate (requires fuel price).
Fuel Efficiency
—
km / L
—
L / 100 km
—
US MPG
—
UK MPG
—
Full tank range: — km
Mileage estimates are based on inputs provided. Actual fuel efficiency varies with driving style, road conditions, traffic, tyre pressure, and vehicle condition.

What This Tool Does

This calculator finds your vehicle’s real-world fuel efficiency (mileage) from the distance you’ve travelled and the fuel you’ve used, along with your total fuel cost and cost per kilometre.

You can also use this LCM calculator.

How It’s Calculated

Mileage (km/l) = Distance Travelled ÷ Fuel Consumed Total Fuel Cost = Fuel Consumed × Fuel Price Fuel Cost per km = Total Fuel Cost ÷ Distance Travelled

Worked example (using an illustrative fuel price, not a live quote): 250 km travelled on 18 litres of petrol, at a hypothetical rate of ₹95/litre.

  • Mileage: 250 ÷ 18 ≈ 13.89 km/l
  • Total fuel cost: 18 × 95 = ₹1,710
  • Fuel cost per km: 1,710 ÷ 250 = ₹6.84/km
  • Fuel cost per 100 km: ₹684

Fuel prices vary by city and change daily, so always use the calculator above with your local current rate rather than a fixed reference figure.

Edge Cases and Special Rules

  • Full-tank-to-full-tank is the most reliable method: Filling up completely, resetting the trip meter, driving until the tank is empty (or near it), then refilling to full again gives a far more accurate reading than a partial top-up.
  • CNG uses different units: Since CNG is measured by weight rather than volume, mileage is expressed in km/kg instead of km/l — don’t mix the two when comparing vehicles.
  • EVs use an entirely different formula: Electric vehicle “mileage” isn’t distance-per-volume at all — it’s based on energy consumption (kWh) and your electricity tariff, calculated as Energy Used = Distance × Efficiency, then Cost = Energy Used × Tariff.
  • Multiple readings give a more reliable average: A single trip’s mileage can be skewed by traffic, AC use, or terrain — averaging 2–3 separate readings gives a more representative figure.

Fuel Efficiency Units by Region and Fuel Type

Mileage isn’t expressed the same way everywhere. India and most of the world use km/l (or l/100km) for petrol and diesel vehicles, while the US and UK commonly use miles per gallon (mpg). CNG vehicles are measured in km/kg due to their fuel being weighed rather than measured by volume. Electric vehicles are typically measured in kWh/km or simply cost-per-km, since there’s no fuel volume involved at all.

Who Uses This

  • Vehicle owners checking real-world mileage against brochure or advertised figures
  • Commuters estimating a realistic monthly fuel budget
  • Buyers comparing running costs across petrol, diesel, CNG, and EV options before purchasing
  • Fleet operators and taxi drivers tracking mileage trends to catch maintenance issues early

Brochure Mileage vs. Real-World Mileage

These are rarely the same number, and the gap catches many buyers off guard. Brochure or advertised mileage comes from standardized lab test cycles under controlled conditions. Real-world mileage reflects actual traffic, driving style, AC usage, tyre pressure, and road conditions — all of which typically bring the number down compared to the advertised figure. Tracking your own mileage over time gives a far more useful benchmark than comparing against the brochure number alone.

FAQ

What is a good mileage for a car or bike?

It varies significantly by vehicle type, engine size, and fuel type — compare your result against your own vehicle’s rated mileage rather than a fixed universal benchmark.

How is CNG mileage different from petrol mileage?

CNG is measured by weight (km/kg) rather than volume, so it can’t be directly compared to a petrol vehicle’s km/l figure without conversion.

Why is my real mileage lower than the brochure figure?

Brochure figures come from standardized lab conditions, while real-world driving involves traffic, AC use, and road conditions that typically reduce actual efficiency.

Does using the AC affect mileage?

Yes — running the air conditioning increases engine load, which generally reduces fuel efficiency, especially in city driving.

How do I measure mileage using the full-tank method?

Fill the tank completely, reset the trip meter, drive normally until the tank is nearly empty, then refill to full and divide the distance by the fuel needed to refill.

Try It Above

Enter your distance travelled, fuel consumed, and current local fuel price in the calculator above to get your mileage and cost per kilometre instantly. Figures depend on your actual driving conditions and local fuel prices at the time of calculation.