21 imperial pints in US gallons

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

We know (by definition) that: $1\mathrm{imperialpint}\approx 0.150118740688107\mathrm{usgallon}$

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

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

Conclusion: 21 ⁢ imperialpint ≈ 3.152493554450247 ⁢ usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 0.317209213191996 times 21 imperial pints.

It can also be expressed as: 21 imperial pints is equal to $\frac{1}{\mathrm{0.317209213191996}}$ US gallons.

Approximation

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