21 US pints in imperial gallons
Result
The conversion result is: 21 US pints is equivalent to 2.1857697346511 imperial gallons.[1]
Conversion formula
How to convert 21 US pints to imperial gallons?
We know (by definition) that: 1 uspint ≈ 0.104084273078624 imperialgallon.
We can set up a proportion to solve for the number of imperial gallons.
1 uspint / 21 uspint ≈ 0.104084273078624 imperialgallon / x imperialgallon
Now, we cross multiply to solve for our unknown x:
x imperialgallon ≈ (21 uspint / 1 uspint) * 0.104084273078624 imperialgallon → x imperialgallon ≈ 2.185769734651104 imperialgallon
Conclusion:
21 uspint ≈ 2.185769734651104 imperialgallon
Conversion in the opposite direction
The inverse of the conversion factor is that 1 imperial gallon is equal to 0.457504733525659 times 21 US pints.
It can also be expressed as: 21 US pints is equal to 1 / 0.457504733525659 imperial gallons.
Approximation
An approximate numerical result would be: twenty-one US pints is about two point one eight imperial gallons, or alternatively, a imperial gallon is about zero point four six times twenty-one US pints.
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.