US MPG to UK MPG Converter
Convert between US Miles Per Gallon (MPG) and UK Miles Per Gallon (MPG) with our easy-to-use calculator. Understand the differences between American and British fuel efficiency measurements and their conversion factors.
Step 1: Input Value
Understanding MPG Differences
US and UK gallons are different sizes. A US gallon is approximately 3.785 liters, while a UK (Imperial) gallon is about 4.546 liters. This means UK MPG values are higher for the same fuel efficiency.
Step 2: Conversion Results
Conversion Formula
UK MPG = US MPG × 1.20095
US MPG = UK MPG ÷ 1.20095
The conversion factor of 1.20095 comes from the ratio between UK and US gallons (4.546 / 3.785 ≈ 1.20095).
MPG Conversion Results
Conversion Result
MPG Comparison Table
| US MPG | UK MPG | Difference | Percentage |
|---|
Conversion Formula Breakdown
Why the Conversion Factor?
US Gallon vs UK (Imperial) Gallon
The conversion factor of 1.20095 comes from the ratio between the sizes of UK and US gallons:
UK Gallon: 4.54609 liters
US Gallon: 3.78541 liters
Ratio: 4.54609 ÷ 3.78541 ≈ 1.20095
This means that for the same distance traveled, a vehicle will use fewer UK gallons than US gallons, resulting in a higher MPG value when measured in UK gallons.
Need Professional Fuel Efficiency Analysis?
Connect with our automotive experts for detailed fuel efficiency analysis, fleet management solutions, and custom fuel-saving strategies for your vehicles.
Get Professional Analysis