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Miles per Gallon (Imp) to Miles per Gallon (US) Converter (mpg (imp) to mpg)

1 miles per gallon (imp) = 0.832673 miles per gallon (us). The UK imperial gallon (4.546 L) is larger than the US gallon (3.785 L), so a car gets more imperial mpg than US mpg: 1 imperial mpg is 0.8327 US mpg.

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Result

37.470292

45 mpg (imp) = 37.470292 mpg

How to convert miles per gallon (imp) to miles per gallon (us)

The UK imperial gallon (4.546 L) is larger than the US gallon (3.785 L), so a car gets more imperial mpg than US mpg: 1 imperial mpg is 0.8327 US mpg. UK car adverts use imperial mpg.

Formula

mpg = mpg (imp) × 0.832673

Worked example

45 mpg (imp) × 0.832673 = 37.4703 mpg

Miles per Gallon (Imp) to Miles per Gallon (US) quick-reference table

Common miles per gallon (imp) to miles per gallon (us) values
Miles per Gallon (Imp) (mpg (imp))Miles per Gallon (US) (mpg)
20 mpg (imp)16.6535 mpg
30 mpg (imp)24.9802 mpg
40 mpg (imp)33.3069 mpg
50 mpg (imp)41.6337 mpg
60 mpg (imp)49.9604 mpg
70 mpg (imp)58.2871 mpg

Real-life examples

A UK car rated at 45 mpg (imp) gets 37.5 US mpg. Remember this when comparing UK reviews with US EPA ratings.

Frequently asked questions

Why does a UK mpg look higher?

The imperial gallon is 20 percent bigger than the US gallon, so the same car covers more miles per gallon.

How do I convert UK mpg to US mpg?

Multiply by 0.8327: 50 UK mpg is 41.6 US mpg.

What is 1 miles per gallon (imp) in miles per gallon (us)?

1 miles per gallon (imp) = 0.832673 miles per gallon (us) (mpg (imp) to mpg).

What is the formula to convert mpg (imp) to mpg?

mpg = mpg (imp) × 0.832673. For example, 45 mpg (imp) × 0.832673 = 37.4703 mpg.

How do I convert mpg back to mpg (imp)?

Use the reverse converter: 1 miles per gallon (us) = 1.20095 miles per gallon (imp). Check: 37.4703 mpg converts back to 45 mpg (imp).

Reverse conversion

Need the other direction? Miles per Gallon (US) to Miles per Gallon (Imp) converter (mpg to mpg (imp)): 1 miles per gallon (us) = 1.20095 miles per gallon (imp).

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