Fuel Economy Converter

In India car mileage is quoted in kilometres per litre. Europe uses litres per 100 km, and the US and UK use miles per gallon, with different gallons.

To see the fuel cost per km.
Results update as you type.

Litres per 100 km (L/100 km)

6.66667

Fuel cost per km
₹6.67
Fuel cost for 1,000 km
₹6,667

Same economy in every unit

Same economy in every unit
UnitValue
Kilometres per litre (km/L)15
Litres per 100 km (L/100 km)6.66667
Miles per gallon (US)35.2822
Miles per gallon (UK)42.3721

About this calculator

Enter the figure you have and add the fuel price to see what each kilometre costs.

How to use it

  1. Enter the value.
  2. Choose the unit it is in and the unit you want.
  3. Read the result, or see every unit in the table.

The formula

L/100 km = 100 ÷ km/L; mpg (US) = km/L × 2.352; mpg (UK) = km/L × 2.825
km/L
distance per litre
L/100 km
fuel used per 100 km: lower is better

Worked example

A car that gives 15 km/L

  1. 15 km/L = 100 ÷ 15 = 6.67 L/100 km.
  2. = 35.3 mpg (US) or 42.4 mpg (UK).
  3. At ₹100 a litre, fuel costs ₹6.67 per km.

What the result means

L/100 km is the inverse of km/L, so differences look different on the two scales.

Assumptions

  • Exact gallon and mile definitions.

Limitations

  • Real mileage depends on traffic, driving and load.

Frequently asked questions

How do I convert km/L to L/100 km?

Divide 100 by the km/L figure.

Why is UK mpg higher than US mpg?

The UK gallon is larger (4.55 L vs 3.79 L).

What is good mileage?

For petrol cars in India, 15 to 20 km/L is good in city and highway use combined.

Last reviewed on 3 October 2026. Found a mistake? Tell us.