What is 1 US gallons per 100 miles in Miles per gallon (Imperial)?

1 US gallons per 100 miles = 120.095 Miles per gallon (Imperial) (gal(US)/100mi → mpg (Imp)).

What is the formula to convert US gallons per 100 miles to Miles per gallon (Imperial)?

mpg (Imp) is a non-linear (reciprocal) function of gal(US)/100mi Example: Use the converter above for an exact computed value..

No — the factor is approximate to engineering precision. The page surfaces an "Approx" badge whenever the relationship is not defined exactly.

Convert us gallons per 100 miles to miles per gallon (imperial) instantly. The conversion factor is approximate to engineering precision.

Realtime·fuel-economy·us

Approx1/x

From

gal(US)/100mi

1/x

Result

mpg (Imp)

120.095

Precision [auto]

mpg (Imp) is a non-linear (reciprocal) function of gal(US)/100mi

Worked example: Use the converter above for an exact computed value.

US gallons per 100 miles (gal(US)/100mi)

US EPA secondary metric.

Miles per gallon (Imperial) (mpg (Imp))

United Kingdom vehicle fuel economy ratings.

US gallons per 100 miles (gal(US)/100mi)	Miles per gallon (Imperial) (mpg (Imp))
5	24.019
10	12.0095
15	8.0063
20	6.0047
25	4.8038
30	4.0032

Want a downloadable CSV? Append ?format=csv to the API /api/v1/table endpoint.

GET https://convertnavi.com/api/v1/convert?value=10&from=gallon-us-per-100mi&to=mpg-imp

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