Miles per US gallon to Miles per imperial gallon

Convert Miles per US gallon to Miles per imperial gallon instantly. Free online fuel economy unit converter with exact formula, conversion table and FAQ.

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Formula

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Formula

1 mpg = 1.200949926 mpg imp

mpg imp = mpg × 1.200949926

mpg = mpg imp ÷ 1.200949926

Conversion table

1 mpg1.20095 mpg imp
2 mpg2.4019 mpg imp
5 mpg6.00475 mpg imp
10 mpg12.009499 mpg imp
20 mpg24.018999 mpg imp
50 mpg60.047496 mpg imp
100 mpg120.094993 mpg imp
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Frequently asked questions

How many miles per imperial gallon are in one miles per us gallon?

One mpg equals 1.200949926 miles per imperial gallon.

How do I convert miles per us gallon to miles per imperial gallon?

Multiply the number of miles per us gallon by 1.200949926 to get miles per imperial gallon. To go the other way, multiply miles per imperial gallon by 0.8326741846 (or divide by 1.200949926) to get miles per us gallon.

Is this conversion exact?

Yes. This conversion uses the exact defined relationship between miles per us gallon and miles per imperial gallon, so the result shown is mathematically precise (rounded only for display).

When is miles per us gallon to miles per imperial gallon conversion commonly used?

It is commonly used in automotive fuel efficiency ratings, vehicle comparisons and shopping, as well as EPA, WLTP and other international fuel economy standards.

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About this conversion

Miles per US gallon and Miles per imperial gallon are both units used to measure fuel economy. Miles per US gallon (mpg) measures how many miles a vehicle travels using one US gallon of fuel; a higher number means better efficiency. It is the standard fuel economy unit used in the United States. Miles per imperial gallon (mpg imp) measures how many miles a vehicle travels using one imperial (UK) gallon of fuel; a higher number means better efficiency. It is used mainly in the United Kingdom and other Commonwealth countries. This converter uses the precise relationship 1 mpg = 1.200949926 mpg imp (equivalently 1 mpg imp = 0.8326741846 mpg), so results stay accurate for automotive fuel efficiency ratings, vehicle comparisons and shopping, as well as EPA, WLTP and other international fuel economy standards.