21 US gallons in imperial pints

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

We know (by definition) that: $1\mathrm{usgallon}\approx 6.66139347703191\mathrm{imperialpint}$

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

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

Conclusion: 21 ⁢ usgallon ≈ 139.88926301767012 ⁢ imperialpint

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial pint is equal to 0.00714851146133842 times 21 US gallons.

It can also be expressed as: 21 US gallons is equal to $\frac{1}{\mathrm{0.00714851146133842}}$ imperial pints.

Approximation

An approximate numerical result would be: twenty-one US gallons is about one hundred and thirty-nine point eight eight imperial pints, or alternatively, a imperial pint is about zero point zero one times twenty-one US gallons.