# Kilometer per Liter Converters

> Convert between km/L, L/100km, MPG (US), and MPG (UK) fuel efficiency units

**Category:** Conversion
**Keywords:** fuel efficiency, km/L, L/100km, MPG, miles per gallon, converter, fuel economy, gas mileage, vehicle, car
**URL:** https://complete.tools/kilometer-per-liter-converters

## How it calculates

The relationships between the different fuel efficiency units can be expressed mathematically. The formulas used are as follows: 

1. From km/L to L/100km: L/100km = 100 ÷ km/L 
2. From L/100km to km/L: km/L = 100 ÷ L/100km 
3. From km/L to MPG (US): MPG (US) = km/L × 2.35215 
4. From MPG (US) to km/L: km/L = MPG (US) ÷ 2.35215 
5. From MPG (UK) to km/L: km/L = MPG (UK) × 0.425144 
6. From km/L to MPG (UK): MPG (UK) = km/L ÷ 0.425144 

Each formula uses basic arithmetic operations to convert between units by defining a relationship based on distance traveled and fuel consumed. The constants (2.35215 and 0.425144) adjust the values to align with the different measurement systems.

## Who should use this

Fleet managers optimizing fuel consumption for delivery vehicles, automotive engineers conducting fuel efficiency tests on new models, environmental scientists analyzing transportation emissions based on fuel economy metrics, and budget-conscious drivers comparing fuel costs across different vehicles before purchasing.

## Worked examples

Example 1: A vehicle achieves a fuel efficiency of 15 km/L. To convert this to L/100km: L/100km = 100 ÷ 15 = 6.67. This means the vehicle uses approximately 6.67 liters of fuel to travel 100 kilometers.

Example 2: A car has a fuel consumption of 30 MPG (US). To convert this to km/L: km/L = 30 ÷ 2.35215 ≈ 12.74. Thus, the car can travel about 12.74 kilometers on one liter of fuel.

Example 3: A vehicle reports a fuel efficiency of 50 MPG (UK). To convert to km/L: km/L = 50 × 0.425144 ≈ 21.26. This indicates that the vehicle can travel approximately 21.26 kilometers on one liter of fuel, demonstrating its high efficiency.

## Limitations

The tool may encounter limitations such as rounding errors during conversions, particularly when dealing with very small or very large numbers that may affect precision. Additionally, the conversion factors used assume standard conditions and do not account for variations in fuel density or driving conditions that can affect actual fuel efficiency. Edge cases, such as extremely low fuel efficiencies (e.g., less than 1 km/L) or very high values, may produce results that are less reliable. Users should be aware that the tool provides mathematical conversions and does not account for real-world factors influencing fuel consumption.

## FAQs

**Q:** How do the conversion factors for MPG differ between the US and UK?


**A:** The US and UK MPG values differ because the US gallon is approximately 3.785 liters, while the UK gallon is about 4.546 liters. This difference affects the efficiency calculation, resulting in different conversion factors for each system.


**Q:** Why is L/100km often preferred in many countries over km/L?


**A:** L/100km is preferred as it provides a clearer understanding of fuel consumption, indicating how much fuel is needed for a specific distance, which can aid consumers in assessing vehicle efficiency more directly.


**Q:** What assumptions are made when converting between these units?


**A:** The conversions assume that fuel density is constant and that the vehicle operates under standard conditions. Variability in actual driving conditions and fuel types may lead to discrepancies between calculated and real-world efficiency.


**Q:** Are there any specific scenarios where this tool may yield inaccurate results?


**A:** The tool may yield inaccurate results for vehicles with hybrid systems or those that experience significant fluctuations in fuel efficiency depending on driving conditions, as these factors are not accounted for in the simple mathematical conversions.

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