Fuel Consumption Converter

Convert fuel economy between km/l, mpg (US), mpg (UK), and L/100km.

Result

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How to use the Fuel Consumption Converter

  1. Enter the value you want to convert.
  2. Choose the unit you are converting from.
  3. Choose the unit you are converting to (km/L, MPG US, MPG UK or L/100km).
  4. The result updates instantly; use swap to reverse the direction.

Conversion factors

MPG (US) = km/L × 2.352  |  MPG (UK) = km/L × 2.825  |  L/100km = 100 ÷ km/L

km/L and MPG measure distance per fuel (higher is better), while L/100km measures fuel per distance (lower is better), so they are inverses of each other.

Worked example

A car that gives 15 km/L

= 35.3 MPG (US)

= 42.4 MPG (UK)

= 6.67 L/100 km

Why US and UK MPG differ

A US gallon is 3.785 litres but a UK (imperial) gallon is 4.546 litres. The same car therefore shows a higher MPG figure in the UK than in the US. When comparing reviews from different countries, always check which gallon is used, or convert both to km/L or L/100 km.

Tips for accurate results

  • Indian and Japanese brochures use km/L; Europe and Australia use L/100 km.
  • Real-world mileage is usually 10–25% lower than the official ARAI or WLTP figure.
  • Use the fuel cost calculator to turn mileage into rupees per trip.

Frequently Asked Questions

Divide 100 by the L/100km figure. 5 L/100km = 20 km/L.

For a petrol hatchback in India it is average; small petrol cars often get 18–22 km/L, SUVs 10–15 km/L.

Lower L/100km means less fuel used, so lower is better.

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Content reviewed by Vinod, Easy Smart Calculator · Last updated October 2026