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

Here you can quickly calculate how many gallons per 100 miles (US) fit in one miles per gallon (US).
write a number and we convert instantly
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  • 1 mpg (US) = 100 gal/100 mi (US)
  • 1 gal/100 mi (US) = 100 mpg (US)

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

  • 1 Miles per gallon (US) = 100 Gallons per 100 miles (US)

Miles per gallon (US) to gallons per 100 miles (US) conversion table

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

Miles per gallon (US) to gallons per 100 miles (US) formula

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

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

Score: 0

6.9 gallons per 100 miles (US) equals 14.5 miles per gallon (US).

Correct answer: 6.9 gallons per 100 miles (US) = 14.5 miles per gallon (US).

20.3 miles per gallon (US) equals 4.93 gallons per 100 miles (US).

Correct answer: 20.3 miles per gallon (US) = 4.93 gallons per 100 miles (US).

20.8 gallons per 100 miles (US) equals 4.81 miles per gallon (US).

Correct answer: 20.8 gallons per 100 miles (US) = 4.81 miles per gallon (US).

More fuel consumption conversions