“A US gallon is 4.55 litres — same as UK gallon.”
Usage Entry 1324 / 1350 60-second read
Gallon vs. Litre
US/UK imperial liquid unit versus the metric liquid unit, with different values for US and UK gallon.
The comparisoni
“A US gallon is 3.785 litres; a UK (imperial) gallon is 4.546 litres. Same word, different sizes.”
The ruleii
¶
US GAL ≈ 3.785 L. UK GAL ≈ 4.546 L.
GALLON has two values: a US gallon is 3.785 litres; a UK (imperial) gallon is 4.546 litres. A LITRE (or liter, US) is the metric unit — exactly 1,000 cubic centimetres. Fuel prices and recipes cross borders; always check which gallon.
Memory aidiii
Remember it like this
US gal < UK gal.