Mile per US gallon to Mile per imperial gallon Converter
Type a value — the answer appears instantly. 1 mpg (US) = 1.2009 mpg (UK).
Reviewed by the OmniCalc teamMethod verified 2026-07-01
36.028 miles per imperial gallon
= 7.8405 L/100km= 12.754 km/L
equals 36.028 miles per imperial gallonFormula: mpg (UK) = mpg (US) × 1.2009499
Mile per US gallon to Mile per imperial gallon formula
mpg (UK) = mpg (US) × 1.2009499
Convert 5 miles per US gallon to miles per imperial gallon
- Start with 5 miles per US gallon.
- Multiply by the conversion factor: 5 × 1.20095 = 6.0047.
- So 5 mpg (US) = 6.0047 mpg (UK).
Mile per US gallon to Mile per imperial gallon conversion table
| Miles per US gallon (mpg (US)) | Miles per imperial gallon (mpg (UK)) |
|---|---|
| 3 mpg (US) | 3.6028 mpg (UK) |
| 4 mpg (US) | 4.8038 mpg (UK) |
| 5 mpg (US) | 6.0047 mpg (UK) |
| 6 mpg (US) | 7.2057 mpg (UK) |
| 7 mpg (US) | 8.4066 mpg (UK) |
| 8 mpg (US) | 9.6076 mpg (UK) |
| 9 mpg (US) | 10.809 mpg (UK) |
| 10 mpg (US) | 12.009 mpg (UK) |
| 12 mpg (US) | 14.411 mpg (UK) |
| 15 mpg (US) | 18.014 mpg (UK) |
| 18 mpg (US) | 21.617 mpg (UK) |
| 20 mpg (US) | 24.019 mpg (UK) |
| 25 mpg (US) | 30.024 mpg (UK) |
| 30 mpg (US) | 36.028 mpg (UK) |
| 35 mpg (US) | 42.033 mpg (UK) |
| 40 mpg (US) | 48.038 mpg (UK) |
| 45 mpg (US) | 54.043 mpg (UK) |
| 50 mpg (US) | 60.047 mpg (UK) |
| 60 mpg (US) | 72.057 mpg (UK) |
| 70 mpg (US) | 84.066 mpg (UK) |
| 80 mpg (US) | 96.076 mpg (UK) |
| 90 mpg (US) | 108.09 mpg (UK) |
| 100 mpg (US) | 120.09 mpg (UK) |
Unit definitions
What is a mile per US gallon?
Miles per US gallon (mpg) is the fuel-economy measure used in the United States, counting how many miles a vehicle travels on one US gallon (3.785 liters) of fuel. A higher number means better economy. It is the reciprocal of liters-per-100km once gallons and miles are accounted for.
What is a mile per imperial gallon?
Miles per imperial gallon is the fuel-economy measure used in the United Kingdom. The imperial gallon (4.546 liters) is about 20% larger than the US gallon, so the same car reads a higher mpg figure in UK units than in US units — a common source of confusion when comparing quoted economy.
Frequently asked questions
How many miles per imperial gallon are in one mile per US gallon?
One mile per US gallon equals 1.2009 miles per imperial gallon (1 mpg (US) = 1.2009 mpg (UK)).
How do I convert miles per US gallon to miles per imperial gallon?
Multiply the value in miles per US gallon by 1.20095. For example, 10 mpg (US) × 1.20095 = 12.009 mpg (UK).
Which is bigger — a mile per US gallon or a mile per imperial gallon?
A mile per US gallon is bigger: one mile per US gallon contains 1.2009 miles per imperial gallon.
Is this mile per US gallon to mile per imperial gallon converter free?
Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.
Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.