Gallon (UK)/100mi to Miles/Gallon (UK) Converter

Fuel Economy Converter

11 units available

Decimals:

From

To

797.955123

1 gal (UK)/100mi = 797.955123 mpg (UK)

Formula:

mpg (UK) = gal (UK)/100mi × 797.9551227662

With your value: 1 gal (UK)/100mi = 797.95512277 mpg (UK)

Other Gallon (UK)/100mi to Miles/Gallon (UK) conversions

2 gal (UK)/100mi to mpg (UK)3 gal (UK)/100mi to mpg (UK)4 gal (UK)/100mi to mpg (UK)5 gal (UK)/100mi to mpg (UK)6 gal (UK)/100mi to mpg (UK)7 gal (UK)/100mi to mpg (UK)8 gal (UK)/100mi to mpg (UK)

Gallon (UK)/100mi to Miles/Gallon (UK) Conversion Table

Gallon (UK)/100mi (gal (UK)/100mi)	Miles/Gallon (UK) (mpg (UK))
0.5	1,595.910246
1	797.955123
2	398.977561
5	159.591025
10	79.795512
15	53.197008
20	39.897756
25	31.918205
50	15.959102
100	7.979551
250	3.19182
500	1.59591
1000	0.797955

Miles/Gallon (UK) to Gallon (UK)/100mi Conversion Table

Miles/Gallon (UK) (mpg (UK))	Gallon (UK)/100mi (gal (UK)/100mi)
0.5	1,595.910246
1	797.955123
2	398.977561
5	159.591025
10	79.795512
15	53.197008
20	39.897756
25	31.918205
50	15.959102
100	7.979551
250	3.19182
500	1.59591
1000	0.797955

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.

Gallon (UK)/100mi (gal (UK)/100mi)

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 (UK) (mpg (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

How to Convert Gallon (UK)/100mi to Miles/Gallon (UK)

This conversion uses an offset formula, so it cannot be described by a single multiplication factor.

Formula: mpg (UK) = gal (UK)/100mi × 797.9551227662

Reverse: gal (UK)/100mi = mpg (UK) × 797.9551227662

Step-by-Step Example

Start with your value in Gallon (UK)/100mi. For example: 5 gal (UK)/100mi
Apply mpg (UK) = gal (UK)/100mi × 797.9551227662
The result is: 159.591025 mpg (UK)

About Gallon (UK)/100mi

The gallon (uk)/100mi (gal (UK)/100mi) is a unit of fuel economy. The gallon (uk)/100mi scale is offset from the kilometre per litre scale, so converting it requires both a factor and an offset rather than a single multiplier. 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 (UK)

The miles/gallon (uk) (mpg (UK)) is a unit of fuel economy. One miles/gallon (uk) equals 0.354006044 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.

Frequently Asked Questions

How many Miles/Gallon (UK) are in 1 Gallon (UK)/100mi?

There are exactly 797.9551227662 Miles/Gallon (UK) in 1 Gallon (UK)/100mi.

What is the formula to convert Gallon (UK)/100mi to Miles/Gallon (UK)?

The formula to convert Gallon (UK)/100mi to Miles/Gallon (UK) is: mpg (UK) = gal (UK)/100mi × 797.9551227662. For example, to convert 10 Gallon (UK)/100mi to Miles/Gallon (UK), you would apply the formula to 10.

What is a Gallon (UK)/100mi?