MPG (US) to MPG (UK) Converter

ConversionEdited by Hemant Kumar and Anjita Rai, founders · How we checkUpdated Free · No sign-up

Quick answer: To convert MPG to MPG, multiply by 1.20095. For example, 25 mpg (US) is 30.02375 mpg (UK). One mile per us gallon equals 1.20095 mpg (UK).

Use the MPG (US) to MPG (UK) Converter

MPG (US) to MPG (UK) formula and what each symbol means

mpg (UK) = mpg (US) × 1.20095

Symbols used in the formula
SymbolMeaning
mpg (US)Mile per US gallon
mpg (UK)Mile per imperial gallon

MPG (US) to MPG (UK) examples

8 mpg (US)

8 mpg (US) × 1.20095 = 9.607599 mpg (UK).

25 mpg (US)

25 mpg (US) × 1.20095 = 30.02375 mpg (UK).

40 mpg (US)

40 mpg (US) × 1.20095 = 48.038 mpg (UK).

MPG (US) compared with MPG (UK)

One mpg (US) is 1.201 times as large as one mpg (UK), so your number gets bigger when you convert MPG to MPG and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.

About MPG and MPG

Mile per US gallon (mpg (US)): Miles per US gallon. Mile per imperial gallon (mpg (UK)): Miles per imperial gallon.

Where MPG to MPG conversions are used

Fleet and trip-cost planning start from consumption figures. Cars are rated in litres per 100 km in Europe and India, mpg in the US and UK, and km/L in several Asian markets.

How to calculate MPG (US) to MPG (UK) step by step

  1. Enter the value in mpg (US) (the starting unit).
  2. Multiply by 1.20095, because 1 mpg (US) = 1.20095 mpg (UK).
  3. The product is the value in mpg (UK). To go back, divide by 1.20095 or multiply by 0.8326742.

Popular fuel consumption conversions

How to read your MPG (US) to MPG (UK) result

Quick estimate: multiply by about 1.2 to get MPG from MPG; this is within 0.1% of the exact factor. Fuel economy can be written as distance per volume (km/L, mpg) or volume per distance (L/100 km).

MPG (US)MPG (UK)
56.00475
67.2057
89.607599
1012.0095
1518.01425
2024.019
3036.0285
4048.038

MPG (UK) to MPG (US): quick table

MPG (UK)MPG (US)
75.828719
129.99209
1814.98814
2218.31883
3024.98023
3529.1436

Common mistakes when calculating MPG (US) to MPG (UK)

  • Comparing a car quoted in L/100 km with another in mpg without converting.
  • Dividing when you should multiply: from mpg (US) to mpg (UK) multiply by 1.20095; from mpg (UK) to mpg (US) divide by 1.20095.

MPG (US) to MPG (UK) FAQ

How many mpg (UK) are in 1 mpg (US)?

1 mpg (US) equals 1.20095 mpg (UK).

How many mpg (US) are in 1 mpg (UK)?

1 mpg (UK) equals 0.8326742 mpg (US).

Is 1 mpg (US) = 1.20095 mpg (UK) an exact conversion?

The factor is shown rounded to 7 significant figures (1.20095). The calculator above uses more digits.

What is a mile per imperial gallon (mpg (UK))?

Miles per imperial gallon.

How can I estimate MPG to MPG in my head?

Quick estimate: multiply by about 1.2 to get MPG from MPG; this is within 0.1% of the exact factor.

What is 35 mpg (US) in MPG?

35 mpg (US) = 42.03325 mpg (UK) (since 35 × 1.20095).

What is 30 mpg (US) in MPG?

30 mpg (US) = 36.0285 mpg (UK) (since 30 × 1.20095).

What is 22 mpg (US) in MPG?

22 mpg (US) = 26.4209 mpg (UK) (since 22 × 1.20095).

How many decimals should I keep when converting mpg (US) to mpg (UK)?

Match the precision of your original measurement. For example, 30.02375 mpg (UK) rounds to 30 mpg (UK) at 3 significant figures; keep more digits only for engineering or scientific work.

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Method, review and disclaimer

Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors