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Fuel Efficiency Converter

Fuel Efficiency Converter from Gizcalc helps you estimate results quickly within the Unit Conversions category.

  • Instant results
  • Charts & tables
  • Save & compare
  • Private – runs in your browser
Converted Value —

Sample inputs are pre-filled so you can see a result quickly. Results are estimates only and may not be accurate because prices, interest rates, taxes, fees, fuel costs, tariffs, market returns, medical costs, and local rules can change. Please verify current values before making financial, tax, legal, medical, or business decisions.

Formula used

L/100 km = 100 ÷ km/L; US mpg = km/L × 2.352; UK mpg = km/L × 2.825

  • km/L = distance per litre
  • L/100 km = fuel used per 100 km

About the Fuel Efficiency Converter

What is the Fuel Efficiency Converter?

India quotes mileage in km/L, Europe in L/100 km and the US in miles per gallon. This fuel efficiency converter translates between them.

Note that L/100 km is inverted – lower is better.

How to use the Fuel Efficiency Converter

  1. Value (sample: 15)
  2. From (sample: Kilometres per litre (km/L))
  3. To (sample: Litres per 100 km (L/100 km))
  4. Press Convert Fuel Efficiency (results also refresh as you type). The result card shows the Converted Value, along with km per litre, Litres per 100 km, Miles per US gallon and Miles per UK gallon.

Formula used

L/100 km = 100 ÷ km/L; US mpg = km/L × 2.352; UK mpg = km/L × 2.825

  • km/L = distance per litre
  • L/100 km = fuel used per 100 km

Worked example

These are the sample values already filled in the calculator above, and the result it returns for them:

InputSample value
Value15
FromKilometres per litre (km/L)
ToLitres per 100 km (L/100 km)
ResultValue
Converted Value6.667 L/100 km
km per litre15 km/L
Litres per 100 km6.667 L/100 km
Miles per US gallon35.282 mpg
Miles per UK gallon42.372 mpg
Fuel for 1,000 km66.7 L

Tips for using the Fuel Efficiency Converter

  • Real-world mileage is typically 15–25% below ARAI-certified figures.
  • UK mpg figures look higher than US mpg because the UK gallon is bigger.

Frequently asked questions

Divide 100 by the km/L figure. For example, 20 km/L is 5 L/100 km.

30 US mpg is about 12.75 km/L; 30 UK mpg is about 10.6 km/L.

No – L/100 km measures consumption, so a lower value is more efficient.