Fuel Economy Converter

How to Calculate Fuel Economy Conversions

Understanding and converting between different fuel economy units is crucial for comparing vehicle efficiency across different regions and standards. This calculator helps convert between various units used to measure fuel economy.

Formulas for Fuel Economy Conversion

The basic unit we use for conversion is kilometers per liter (km/L). Other units are converted to and from this base unit using the following formulas:

• km/L to L/100km: \[ \text{L/100km} = \frac{100}{\text{km/L}} \]
• km/L to MPG (US): \[ \text{MPG (US)} = \frac{\text{km/L} \times 2.35215}{\text{km/mi}} \]
• km/L to MPG (UK): \[ \text{MPG (UK)} = \frac{\text{km/L} \times 2.82481}{\text{km/mi}} \]

Where:

• 1 mile = 1.60934 kilometers
• 1 US gallon = 3.78541 liters
• 1 UK gallon = 4.54609 liters

Calculation Steps

1. Convert the input value to km/L if it's not already in that unit.
2. Apply the appropriate formula to convert km/L to the desired output unit.
3. Round the result to a reasonable number of decimal places (usually 2).

Example Calculation

Let's convert 30 MPG (US) to L/100km:

1. Convert 30 MPG (US) to km/L: \[ 30 \text{ MPG (US)} \times \frac{1.60934 \text{ km/mi}}{3.78541 \text{ L/gal}} = 12.75 \text{ km/L} \]
2. Convert 12.75 km/L to L/100km: \[ \frac{100}{12.75 \text{ km/L}} = 7.84 \text{ L/100km} \]

Therefore, 30 MPG (US) is equivalent to approximately 7.84 L/100km.

Diagram of Fuel Economy Conversion

The following diagram illustrates the concept of fuel economy conversion:

This diagram shows the relationship between MPG (US) and L/100km. The height of each bar represents the relative efficiency, with taller bars indicating better efficiency for MPG, while shorter bars indicate better efficiency for L/100km.