Convert Miles per Gallon (UK) to Miles per Gallon (US)
No popups. No autoplay ads. Accurate answers with formulas shown.
Everyday
About Fuel Economy Conversions
Two regions measure fuel economy in opposite directions. The US uses miles per gallon, where higher is better; most of Europe uses liters per 100 kilometers, where lower is better. That inversion is what makes the mental math hard: 30 US MPG works out to about 7.84 L/100km, and 5 L/100km comes to about 47 MPG. The gallon adds a second trap, since a UK gallon is larger than a US one, so the same car rates about 20% higher in UK MPG. All three standards convert on exact factors below.
Quick Conversions
| Unit Name | Symbol | Per 1 Mile per Gallon (UK) |
|---|---|---|
| Kilometer per Liter | km/L | 0.354006 |
| Liter per 100km | L/100km | 282.481 |
| Mile per Gallon (UK) | mpg (UK) | 1 |
| Mile per Gallon (US) | mpg | 0.832673 |
Frequently Asked Questions
How do I convert Miles per Gallon (UK) to Miles per Gallon (US)?
To convert Miles per Gallon (UK) to Miles per Gallon (US), use the conversion where 1 Mile per Gallon (UK) (mpg (UK)) = 0.832673 Miles per Gallon (US) (mpg). For example, 1 Mile per Gallon (UK) = 0.832673 Miles per Gallon (US).
What are common Mile per Gallon (UK) to Mile per Gallon (US) conversions?
Here are common conversions: 1 Miles per Gallon (UK) = 0.832673 Miles per Gallon (US), 5 Miles per Gallon (UK) = 4.16337 Miles per Gallon (US), 10 Miles per Gallon (UK) = 8.32673 Miles per Gallon (US), 25 Miles per Gallon (UK) = 20.8168 Miles per Gallon (US), 50 Miles per Gallon (UK) = 41.6337 Miles per Gallon (US), 100 Miles per Gallon (UK) = 83.2673 Miles per Gallon (US).
When would I need to convert Miles per Gallon (UK) to Miles per Gallon (US)?
Fuel economy conversions come up when comparing vehicle efficiency ratings across countries. The US uses miles per gallon (MPG), Europe uses liters per 100 kilometers (L/100km), and the UK uses imperial MPG, which differs from US MPG.
How precise are the conversions?
All conversions use exact factors verified against NIST and ISO standards with up to 10 significant figures of precision. Results are calculated using IEEE 754 double-precision arithmetic, which provides approximately 15-17 significant digits. For temperature and other non-linear conversions, exact formulas are used rather than approximations.