21 US gallons in imperial quarts

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

We know (by definition) that: $1\mathrm{usgallon}\approx 3.33069673851596\mathrm{imperialquart}$

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

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

Conclusion: 21 ⁢ usgallon ≈ 69.94463150883516 ⁢ imperialquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial quart is equal to 0.0142970229226768 times 21 US gallons.

It can also be expressed as: 21 US gallons is equal to $\frac{1}{\mathrm{0.0142970229226768}}$ imperial quarts.

Approximation

An approximate numerical result would be: twenty-one US gallons is about sixty-nine point nine three imperial quarts, or alternatively, a imperial quart is about zero point zero one times twenty-one US gallons.