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

Here you can quickly calculate how many miles per gallon (US) fit in one gallons per 100 miles (US).
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  • 1 gal/100 mi (US) = 100 mpg (US)
  • 1 mpg (US) = 100 gal/100 mi (US)

Gallons per 100 miles (US) to miles per gallon (US) conversion table

Gallons per 100 miles (US) Miles per gallon (US)
1 100
2 50
5 20
10 10
20 5
50 2
100 1

Gallons per 100 miles (US) to miles per gallon (US) formula

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

1 gal/100 mi (US) = 100 mpg (US)
Example: 1 Gallons per 100 miles (US) = 100 Miles per gallon (US)

Common fuel consumption conversion mistakes

  • 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.

Quick gallons per 100 miles (US) and miles per gallon (US) conversion quiz

Score: 0

100 miles per gallon (US) equals 1 gallons per 100 miles (US).

Correct answer: 100 miles per gallon (US) = 1 gallons per 100 miles (US).

15.7 miles per gallon (US) equals 6.37 gallons per 100 miles (US).

Correct answer: 15.7 miles per gallon (US) = 6.37 gallons per 100 miles (US).

8.5 gallons per 100 miles (US) equals 23.5 miles per gallon (US).

Correct answer: 8.5 gallons per 100 miles (US) = 11.8 miles per gallon (US).

212 miles per gallon (US) equals 0.283 gallons per 100 miles (US).

Correct answer: 212 miles per gallon (US) = 0.472 gallons per 100 miles (US).

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