21 US quarts in imperial gallons

Result

The conversion result is: 21 US quarts is equivalent to 4.37153946930219 imperial gallons.[1]

Conversion formula
How to convert 21 US quarts to imperial gallons?

We know (by definition) that: 1 usquart ≈ 0.208168546157247 imperialgallon.

We can set up a proportion to solve for the number of imperial gallons.

1 usquart / 21 usquart ≈ 0.208168546157247 imperialgallon / x imperialgallon

Now, we cross multiply to solve for our unknown x:

x imperialgallon ≈ (21 usquart / 1 usquart) * 0.208168546157247 imperialgallon → x imperialgallon ≈ 4.371539469302187 imperialgallon

Conclusion:

21 usquart ≈ 4.371539469302187 imperialgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial gallon is equal to 0.22875236676283 times 21 US quarts.

It can also be expressed as: 21 US quarts is equal to 1 / 0.22875236676283 imperial gallons.

Approximation

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

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.