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Mileage calculator

Written and reviewed by Omm · Last reviewed · General information, not investment advice

Find the mileage your car, bike or scooter really gives. Enter the kilometres driven between two full tanks and the fuel it took to fill up again; the calculator shows km per litre (km per kg for CNG), the fuel used per 100 km and the fuel cost of each kilometre.

Related: Fuel cost calculator · Car running cost calculator

Fuel
km

Between 1 and 100000

l

Between 0.1 and 1000

Between 1 and 1000

The fuel price shown at first is an example. Enter what you paid.

Your vehicle gives 15.0 km/l, which costs ₹6.67 in fuel for every kilometre.

Mileage (km/l)

15.00

Fuel cost per km

₹6.67

Litres used per 100 km

6.67

Cost of this tank

₹3,000

How it works

Mileage = distance driven ÷ fuel used; fuel per 100 km = fuel used ÷ distance × 100; cost per km = fuel price ÷ mileage

The tank-to-tank method is the reliable way to measure mileage. Fill the tank completely and note the odometer reading (or reset the trip meter). Drive as you normally do. At the next fill, fill the tank completely again and note the litres it took and the kilometres driven since the first fill.

Divide the kilometres by the litres. The fuel you just filled is the fuel you used over that distance, because the tank is full again. Repeat over two or three tanks and take the average, since one tank can be thrown off by where the pump cut off.

With the fuel price you paid, the calculator also shows the fuel cost per kilometre, which you can use in the fuel cost calculator to price a trip.

Example. You drive 450 km between two full tanks and the second fill takes 30 litres. The mileage is 15.0 km/l, which is 6.67 litres per 100 km. At ₹100 a litre, each kilometre costs ₹6.67 in fuel.

Read the guide: EV vs petrol car in India: running cost, payback and what to check.

Frequently asked questions

How do I calculate the mileage of my car or bike?

Fill the tank fully and note the odometer. Drive normally, fill the tank fully again, and divide the kilometres driven by the litres of the second fill. For example, 450 km on 30 litres is 15 km/l.

Why is my mileage lower than the company’s figure?

The certified figure comes from a standard test, without traffic jams, heavy loads or constant air conditioning. City traffic, short trips, low tyre pressure, hard acceleration and a late service all lower the real figure.

How can I improve my mileage?

Keep the tyres at the recommended pressure, accelerate and brake smoothly, avoid long idling, service the vehicle on time, and do not carry unnecessary weight. The effect of each is small, but together they add up.

How do I convert km/l to litres per 100 km?

Divide 100 by the km/l figure. 20 km/l is 5 litres per 100 km; 12.5 km/l is 8 litres per 100 km. To go back, divide 100 by the litres per 100 km.

Does this work for CNG and for bikes?

Yes. For CNG choose CNG and enter the kilograms filled; the result is in km per kg. For a bike or scooter the method is the same, with smaller numbers.

Sources

Rules, rates and definitions on this page come from these official sources. Check the current position there before you decide.

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