Gallon (imperial) Per 100 Miles (gal/100 mi (UK))

Imperial (British)Current unit

Imperial gallons used per 100 miles.

1 gallon (imperial) per 100 miles = 35.40061899 kilometers per liter (approximately).

About the gallon (imperial) per 100 miles

Most fuel-economy figures rise when a car gets better, which is why miles per gallon can mislead: going from 10 to 20 miles per gallon saves far more fuel than going from 50 to 60. Quoting consumption per fixed distance avoids that trap, and the United States adopted the idea on its fuel-economy window stickers, which show US gallons per 100 miles. Using imperial gallons of 4.54609 liters gives a British-flavored variant of the same idea, equivalent in spirit to liters per 100 kilometers.

Because lower numbers mean better efficiency, the relationship with distance-per-volume units is a reciprocal. In this converter, kilometers per liter equals 35.4006 divided by the number of imperial gallons per 100 miles, since 100 miles is 160.9344 kilometers and a gallon is 4.54609 liters. For example, 5 gallons per 100 miles is about 7.08 kilometers per liter, or 20 miles per imperial gallon. The unit is rare in practice, and the British continue to rely on miles per imperial gallon alongside liters per 100 kilometers.

Sources: Wikipedia: Fuel economy in automobiles; NIST SP 811, Appendix B.8 conversion factors

Gallon (imperial) Per 100 Miles conversion chart

10 gallons (imperial) per 100 miles expressed in every other fuel economy unit:

More Imperial (British) units

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• long ton (weight & mass)
• hundredweight (UK) (weight & mass)
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• imperial gallon (volume)
• imperial quart (volume)
• imperial pint (volume)
• imperial gill (volume)
• imperial fluid ounce (volume)
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• kilderkin (volume)
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• fortnight (time)
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