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Convert miles per US gallon to miles per imperial gallon

Convert miles per US gallon (mpg) to miles per imperial gallon (mpg UK). 1 mpg = 1.20095 mpg UK, and 1 mpg UK = 0.832674 mpg.

20 mpg = 24.019 mpg UK

MPG to UK MPG formula

mpg UK = mpg × 1.200949926

Multiply the number of miles per US gallon by 1.200949926.

Example: To convert 20 mpg to miles per imperial gallon: 20 × 1.200949926 = 24.019 mpg UK.

Quick answers

What is 20 mpg in miles per imperial gallon?
20 mpg = 24.019 mpg UK
What is 25 mpg in miles per imperial gallon?
25 mpg = 30.0237 mpg UK
What is 30 mpg in miles per imperial gallon?
30 mpg = 36.0285 mpg UK
What is 40 mpg in miles per imperial gallon?
40 mpg = 48.038 mpg UK

MPG to UK MPG conversion table

UK MPG to MPG table
miles per US gallon (mpg)miles per imperial gallon (mpg UK)
10 mpg12.0095 mpg UK
15 mpg18.0142 mpg UK
18 mpg21.6171 mpg UK
20 mpg24.019 mpg UK
22 mpg26.4209 mpg UK
25 mpg30.0237 mpg UK
28 mpg33.6266 mpg UK
30 mpg36.0285 mpg UK
32 mpg38.4304 mpg UK
35 mpg42.0332 mpg UK
40 mpg48.038 mpg UK
45 mpg54.0427 mpg UK
50 mpg60.0475 mpg UK
60 mpg72.057 mpg UK

Frequently asked questions

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 convert 20 mpg to miles per imperial gallon: 20 × 1.200949926 = 24.019 mpg UK.

Is the MPG to UK MPG conversion exact?

Yes. Both units are defined exactly, so 1 mile per US gallon is exactly 1.2009499255 miles per imperial gallon. Results on this page are rounded to six significant digits; pick more decimals in the converter if you need them.

Why are US and UK mpg different?

A US gallon is 3.785 L and an imperial gallon is 4.546 L. Because the UK gallon is about 20% larger, the same car gets about 20% more miles per gallon in UK figures.

What is 20 mpg in miles per imperial gallon?

20 mpg = 24.019 mpg UK.

How do I convert miles per imperial gallon back to miles per US gallon?

Use the reverse relationship: 1 mpg UK = 0.832674 mpg. The UK MPG to MPG page has a converter and a full table.

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