Fuel Consumption Calculator

Enter distance and fuel used to instantly calculate L/100km, km/L and mpg values.

Instant result Runs in browser

Tip: Fill up your tank → drive → fill up again. Enter the liters used and the kilometers driven.

Reference fuel consumption values

Vehicle Type L/100km km/L mpg (ABD)
Small diesel car4 – 616.7 – 2539 – 59
Compact petrol car6 – 812.5 – 16.729 – 39
SUV / large vehicle9 – 137.7 – 11.118 – 26
Hybrid vehicle3.5 – 520 – 28.647 – 67

Unit Converter

Fuel Cost

Estimated Cost
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How to use?

  1. 1
    Enter your data Enter the distance driven (km) and fuel used (L). Measure by filling up, driving, then filling up again.
  2. 2
    Click Calculate L/100km, km/L, mpg (US) and mpg (UK) values appear instantly.
  3. 3
    Calculate trip cost Use the Fuel Cost card on the right to estimate the cost of any journey.

FAQ

How is L/100km calculated?
Formula: (Liters used ÷ km driven) × 100 = L/100km. For example, 40 liters over 500 km: (40 ÷ 500) × 100 = 8 L/100km.
What is mpg?
mpg stands for miles per gallon, used in the US and UK. 1 US gallon ≈ 3.785 L, 1 UK gallon ≈ 4.546 L. Higher mpg means better fuel efficiency.
What affects fuel consumption?
Driving style, speed, road conditions, tire pressure, air conditioning, and vehicle weight all affect consumption. City driving typically uses 30–50% more fuel than highway driving.

How to Calculate Fuel Consumption

Fuel consumption measures how much fuel a vehicle uses to travel a given distance. The most common unit in Europe is L/100km (liters per 100 kilometers), while the US uses mpg (miles per gallon).

Measuring Real Fuel Consumption

The most accurate method: fill up your tank completely, reset the trip meter, drive a distance, then fill up again. Enter the liters added and the distance driven into this calculator to get your real consumption.

Formula: (Liters used ÷ km driven) × 100 = L/100km

Fuel Consumption Unit Comparison

  • L/100km: European standard. Lower is more efficient.
  • km/L: How far you go on one liter. Higher is more efficient.
  • mpg (US): Miles per US gallon (3.785 L). Higher is more efficient.
  • mpg (UK): Miles per Imperial gallon (4.546 L). Always higher than US mpg.

Fuel Saving Tips

Maintain steady speed (90–110 km/h is most efficient), keep tires properly inflated, reduce unnecessary load, and service your vehicle regularly. City stop-and-go traffic uses 30–50% more fuel than highway driving.

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