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

Fuel Economy Converter

11 units available

Decimals:

From

To

0.621371

1 km/gal = 0.621371 mpg

Formula:

mpg = km/gal × 0.621371192

With your value: 1 km/gal = 0.62137119 mpg

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

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

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

Kilometer/Gallon (US) (km/gal)	Miles/Gallon (US) (mpg)
0.5	0.310686
1	0.621371
2	1.242742
5	3.106856
10	6.213712
15	9.320568
20	12.427424
25	15.53428
50	31.06856
100	62.137119
250	155.342798
500	310.685596
1000	621.371192

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

Miles/Gallon (US) (mpg)	Kilometer/Gallon (US) (km/gal)
0.5	0.804672
1	1.609344
2	3.218688
5	8.04672
10	16.09344
15	24.14016
20	32.18688
25	40.2336
50	80.4672
100	160.9344
250	402.336
500	804.672
1000	1,609.344001

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 (US) (km/gal)

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 (US) to Miles/Gallon (US)

To convert from Kilometer/Gallon (US) (km/gal) to Miles/Gallon (US) (mpg), multiply the value by 0.621371192.

Formula: mpg = km/gal × 0.621371192

Reverse: km/gal = mpg × 1.6093440006

Step-by-Step Example

Start with your value in Kilometer/Gallon (US). For example: 5 km/gal
Multiply by the conversion factor: 5 x 0.621371192
The result is: 3.106856 mpg

About Kilometer/Gallon (US)

The kilometer/gallon (us) (km/gal) is a unit of fuel economy. One kilometer/gallon (us) equals 0.264172052 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 (US)?

There are exactly 0.621371192 Miles/Gallon (US) in 1 Kilometer/Gallon (US). This means the conversion factor from Kilometer/Gallon (US) to Miles/Gallon (US) is 0.621371192.

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

The formula to convert Kilometer/Gallon (US) to Miles/Gallon (US) is: mpg = km/gal × 0.621371192. For example, to convert 10 Kilometer/Gallon (US) to Miles/Gallon (US), you would multiply 10 by 0.621371192.

What is a Kilometer/Gallon (US)?