Mileage Calculator
Work out your car or bike fuel mileage in km per litre, litres per 100 km and cost per km.
Fill the tank, note the odometer, drive, and refill to measure how many litres you used.
Mileage
17.5 km/L
Consumption
5.71 L/100 km
Running cost
₹5.71/km
At ₹100/L
City and highway driving give different figures — measure over a mix of routes.
Mileage Calculator on True Calculator gives you an instant, accurate answer with no sign-up and no app install. Work out your car or bike fuel mileage in km per litre, litres per 100 km and cost per km. Every result shows the formula and a worked example so you can verify the calculation yourself, and all values are computed in your own browser — your numbers never leave your device.
Popular uses: mileage calculator · km per litre · fuel efficiency calculator
How We Calculate
This calculator uses simple, everyday arithmetic verified by our team. All calculations are performed instantly in your browser using JavaScript — no data is sent to any server.
Rates and figures used here follow common Indian retail and billing conventions, and are regularly updated to match current practice.
When to Use This Calculator
Use this calculator to track what your car, scooter or bike actually costs to run, rather than trusting brochure figures. Commuters planning budgets, cab and delivery drivers pricing trips, and families comparing two vehicles before a purchase all need real km/L numbers. The cost-per-km figure translates mileage directly into money, which matters when fuel prices shift and you want to know the impact on a monthly budget. Fleet owners and rental operators use the same measurement to spot vehicles that need servicing, since a sudden mileage drop often signals a clogged filter or worn plugs. Because the method only needs an odometer and a fuel receipt, it works on any vehicle without special equipment.
How to Use This Calculator
- Step 1: Fill the tank to the brim at a pump and reset the trip meter.
- Step 2: Drive your normal mix of city and highway roads until you need fuel again.
- Step 3: Note the distance covered and the litres shown on the pump at the next full fill.
- Step 4: Enter both values, add today's fuel price, and read km/L, L/100 km and cost per km.
Worked Example
After a tank-to-tank run, your odometer shows 350 km and the pump delivered 20 L. Enter 350 and 20 with a fuel price of ₹100/L. The calculator returns 17.5 km/L, or 5.71 L/100 km, and a running cost of ₹5.71 per kilometre. At that rate, a 40 km daily commute costs roughly ₹228 per day. Averaging three such fills gives a far more honest mileage than any single trip.
Tips and Common Mistakes
- •Use the same pump and the same auto-shutoff nozzle position for consistent fills.
- •Average at least three tank-to-tank measurements before judging your vehicle's real mileage.
- •Check tyre pressure before the test — underinflated tyres quietly cut fuel economy.
- ✗Avoid measuring over a single short trip; cold starts and traffic skew the result badly.
- ✗Don't compare mileage measured with the AC off to daily driving with the AC on.
Frequently Asked Questions
How do I measure my car's real mileage?
Fill the tank completely, note the odometer, drive normally, then fill again at the same pump. Divide the kilometres between fills by the litres added — for example 350 km on 20 L gives 17.5 km/L.
What is the difference between km/L and L/100 km?
km/L tells you how far one litre takes you, while L/100 km tells you how much fuel a 100 km trip uses. They are reciprocals: 17.5 km/L equals 5.71 L/100 km.
How do I find the cost per kilometre?
Divide the fuel price per litre by your mileage. At ₹100/L with 17.5 km/L, every kilometre costs about ₹5.71, which makes comparing daily commutes or ride-hailing fares straightforward.
Why is my tank-to-tank mileage different every time?
Traffic, air-conditioning, tyre pressure and route mix all shift the result. Measure over several full tanks and average the figures instead of trusting a single trip.
Does the calculator work for two-wheelers too?
Yes. Scooters and motorcycles are measured the same way — just note the distance and the litres poured in at the next fill, and the same km/L figure applies.
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