Kilometer/Gallon (UK) to Miles/Gallon (US) Converter

Fuel Economy Converter

11 units available

Decimals:

From

To

0.5174

1 km/gal (UK) = 0.5174 mpg

Formula:

mpg = km/gal (UK) × 0.5173995366

With your value: 1 km/gal (UK) = 0.51739954 mpg

Other Kilometer/Gallon (UK) to Miles/Gallon (US) conversions

2 km/gal (UK) to mpg 3 km/gal (UK) to mpg 4 km/gal (UK) to mpg 5 km/gal (UK) to mpg 6 km/gal (UK) to mpg 7 km/gal (UK) to mpg 8 km/gal (UK) to mpg

Kilometer/Gallon (UK) to Miles/Gallon (US) Conversion Table

Kilometer/Gallon (UK) (km/gal (UK))	Miles/Gallon (US) (mpg)
0.5	0.2587
1	0.5174
2	1.034799
5	2.586998
10	5.173995
15	7.760993
20	10.347991
25	12.934988
50	25.869977
100	51.739954
250	129.349884
500	258.699768
1000	517.399537

Miles/Gallon (US) to Kilometer/Gallon (UK) Conversion Table

Miles/Gallon (US) (mpg)	Kilometer/Gallon (UK) (km/gal (UK))
0.5	0.966371
1	1.932742
2	3.865485
5	9.663712
10	19.327424
15	28.991135
20	38.654847
25	48.318559
50	96.637118
100	193.274236
250	483.185589
500	966.371179
1000	1,932.742357

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Kilometer/Gallon (UK) (km/gal (UK))

Fuel Economy

Exact conversion

Composite of a defined volume and a defined length. US and imperial gallons differ, so mpg figures are not interchangeable between them.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Miles/Gallon (US) (mpg)

Fuel Economy

Exact conversion

Composite of a defined volume and a defined length. US and imperial gallons differ, so mpg figures are not interchangeable between them.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Kilometer/Gallon (UK) to Miles/Gallon (US)

To convert from Kilometer/Gallon (UK) (km/gal (UK)) to Miles/Gallon (US) (mpg), multiply the value by 0.5173995366.

Formula: mpg = km/gal (UK) × 0.5173995366

Reverse: km/gal (UK) = mpg × 1.9327423571

Step-by-Step Example

Start with your value in Kilometer/Gallon (UK). For example: 5 km/gal (UK)
Multiply by the conversion factor: 5 x 0.5173995366
The result is: 2.586998 mpg

About Kilometer/Gallon (UK)

The kilometer/gallon (uk) (km/gal (UK)) is a unit of fuel economy. One kilometer/gallon (uk) equals 0.219969157 kilometre per litres. UnitConvertLab converts it against every other fuel economy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: fuel economy calculations, engineering and science, education.

About Miles/Gallon (US)

Miles per gallon (mpg) is the standard measure of fuel economy in the United States.

Common uses: car window stickers, fuel costs, environmental metrics.

Frequently Asked Questions

How many Miles/Gallon (US) are in 1 Kilometer/Gallon (UK)?

There are exactly 0.5173995366 Miles/Gallon (US) in 1 Kilometer/Gallon (UK). This means the conversion factor from Kilometer/Gallon (UK) to Miles/Gallon (US) is 0.5173995366.

What is the formula to convert Kilometer/Gallon (UK) to Miles/Gallon (US)?

The formula to convert Kilometer/Gallon (UK) to Miles/Gallon (US) is: mpg = km/gal (UK) × 0.5173995366. For example, to convert 10 Kilometer/Gallon (UK) to Miles/Gallon (US), you would multiply 10 by 0.5173995366.

What is a Kilometer/Gallon (UK)?