Convert miles per gallon (UK) to gallons per 100 miles (US)

Here you can quickly calculate how many gallons per 100 miles (US) fit in one miles per gallon (UK).

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Example: miles per gallon (UK) to gallons per 100 miles (US)

Starting value Increment Accuracy

To convert miles per gallon (UK) to gallons per 100 miles (US), divide 120.094993 by the input value.

1 mpg (UK) = 120.094993 gal/100 mi (US)

Example: 1 Miles per gallon (UK) = 120.094993 Gallons per 100 miles (US)

US and UK mpg use different gallons: the imperial gallon (4.546 L) is 20% larger than the US gallon (3.785 L). The same car therefore scores about 20% higher in UK figures, 40 mpg UK ≈ 33 mpg US. Check which gallon a source means.
Mpg is inverted relative to consumption, so improvements are not linear: going from 10 to 20 mpg halves fuel use, while 40 to 50 mpg cuts it by only a fifth. Convert to l/100 km when comparing savings, that scale is proportional to actual fuel burned.

Score: 0

81 gallons per 100 miles (US) equals 2.22 miles per gallon (UK).

Correct answer: 81 gallons per 100 miles (US) = 1.48 miles per gallon (UK).

124 gallons per 100 miles (US) equals 0.484 miles per gallon (UK).

Correct answer: 124 gallons per 100 miles (US) = 0.969 miles per gallon (UK).

127 miles per gallon (UK) equals 1.89 gallons per 100 miles (US).

Correct answer: 127 miles per gallon (UK) = 0.946 gallons per 100 miles (US).

1.5 gallons per 100 miles (US) equals 40 miles per gallon (UK).

Correct answer: 1.5 gallons per 100 miles (US) = 80.1 miles per gallon (UK).