Mile per imperial gallon to Mile per US gallon Converter
Type a value — the answer appears instantly. 1 mpg (UK) = 0.83267 mpg (US).
Reviewed by the OmniCalc teamMethod verified 2026-07-01
24.98 miles per US gallon
= 9.416 L/100km= 10.62 km/L
equals 24.98 miles per US gallonFormula: mpg (US) = mpg (UK) × 0.83267418
Mile per imperial gallon to Mile per US gallon formula
mpg (US) = mpg (UK) × 0.83267418
Convert 5 miles per imperial gallon to miles per US gallon
- Start with 5 miles per imperial gallon.
- Multiply by the conversion factor: 5 × 0.832674 = 4.1634.
- So 5 mpg (UK) = 4.1634 mpg (US).
Mile per imperial gallon to Mile per US gallon conversion table
| Miles per imperial gallon (mpg (UK)) | Miles per US gallon (mpg (US)) |
|---|---|
| 3 mpg (UK) | 2.498 mpg (US) |
| 4 mpg (UK) | 3.3307 mpg (US) |
| 5 mpg (UK) | 4.1634 mpg (US) |
| 6 mpg (UK) | 4.996 mpg (US) |
| 7 mpg (UK) | 5.8287 mpg (US) |
| 8 mpg (UK) | 6.6614 mpg (US) |
| 9 mpg (UK) | 7.4941 mpg (US) |
| 10 mpg (UK) | 8.3267 mpg (US) |
| 12 mpg (UK) | 9.9921 mpg (US) |
| 15 mpg (UK) | 12.49 mpg (US) |
| 18 mpg (UK) | 14.988 mpg (US) |
| 20 mpg (UK) | 16.653 mpg (US) |
| 25 mpg (UK) | 20.817 mpg (US) |
| 30 mpg (UK) | 24.98 mpg (US) |
| 35 mpg (UK) | 29.144 mpg (US) |
| 40 mpg (UK) | 33.307 mpg (US) |
| 45 mpg (UK) | 37.47 mpg (US) |
| 50 mpg (UK) | 41.634 mpg (US) |
| 60 mpg (UK) | 49.96 mpg (US) |
| 70 mpg (UK) | 58.287 mpg (US) |
| 80 mpg (UK) | 66.614 mpg (US) |
| 90 mpg (UK) | 74.941 mpg (US) |
| 100 mpg (UK) | 83.267 mpg (US) |
Unit definitions
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.
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.
Frequently asked questions
How many miles per US gallon are in one mile per imperial gallon?
One mile per imperial gallon equals 0.83267 miles per US gallon (1 mpg (UK) = 0.83267 mpg (US)).
How do I convert miles per imperial gallon to miles per US gallon?
Multiply the value in miles per imperial gallon by 0.832674. For example, 10 mpg (UK) × 0.832674 = 8.3267 mpg (US).
Which is bigger — a mile per imperial gallon or a mile per US gallon?
A mile per US gallon is bigger: one mile per US gallon contains 1.2009 miles per imperial gallon.
Is this mile per imperial gallon to mile per US 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.