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km per Litre Calculator

Convert kilometers per litre (km/L) into Miles Per Gallon (MPG) and Litres per 100km (L/100km) with instant conversions.

Calculator Inputs

Live
km
10 km2,000 km
L
1 L150 L
Calculation Results
Fuel Efficiency (km / Litre)
15 km/L
US Miles Per Gallon
35.28 MPG
UK Imperial MPG
42.37 MPG
European Metric
6.67 L/100km
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How to use the km per Litre Calculator

  1. 1Enter kilometers driven.
  2. 2Enter litres of fuel consumed.
  3. 3View km/L, US MPG, UK MPG, and European L/100km conversions.

How km/L is Calculated

Distance in kilometers is divided by fuel in litres to obtain km/L, which converts directly into imperial and international metrics.

Mathematical Formula
km/L = Kilometers / Litres L/100km = 100 / (km/L) US MPG = km/L × 2.35215
Formula Variables & Logic

L/100km is an inverse metric: lower numbers indicate better efficiency, unlike km/L and MPG where higher is better.

Worked Example: Hatchback Efficiency Conversion
Sample Calculation
Scenario: A compact car travels 400 km using 22 litres of petrol.
Step-by-step breakdown
  1. 1km/L = 400 / 22 = 18.18 km/L
  2. 2US MPG = 18.18 × 2.35215 = 42.76 MPG
  3. 3L/100km = 100 / 18.18 = 5.50 L/100km
Estimated Result
Efficiency is 18.18 km/L (42.76 US MPG, 5.50 L/100km).

What affects km/L results

  • Engine displacement and turbocharging.
  • Transmission type (manual, CVT, automatic torque converter).
  • Vehicle curb weight.
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Frequently Asked Questions

Why do European countries use L/100km instead of km/L?

L/100km provides a linear representation of fuel consumed over fixed distances, making it easier to calculate financial savings when comparing cars.

How do I convert 15 km/L to MPG?

Multiply 15 by 2.35215 to get 35.28 US MPG.

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