1 US quart in imperial gallons

Conversion

1 US quart is equivalent to 0.208168546157247 imperial gallons.^[1]

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial gallon is equal to 4.80379970201942 times 1 US quart.

It can also be expressed as: 1 US quart is equal to $\frac{1}{4.80379970201942}$ imperial gallons.

Approximation

An approximate numerical result would be: one US quart is about zero point two one imperial gallons, or alternatively, a imperial gallon is about four point seven nine times one US quart.

Units involved

This is how the units in this conversion are defined:

Us Quarts

"All traditional U.S. length and volume measures have been legally standardized for commerce by the international yard and pound agreement of 1959 using the definition of 1 yard being exactly equal to 0.9144 meter."

Wikipedia page of US quarts

Imperial Gallons

"The imperial (UK) gallon, now defined as exactly 4.54609 litres (about 277.42 cubic inches), is used in some Commonwealth countries and was originally based on the volume of 10 pounds (approximately 4.54 kg) of water at 62 °F (17 °C). The imperial fluid ounce is defined as 1⁄160 of an imperial gallon; there are four quarts in a gallon, two pints in a quart, and 20 Imperial fluid ounces in an imperial pint."

Wikipedia page of imperial gallons

Footnotes

[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.