21 imperial gallons in imperial quarts

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

We know (by definition) that: $1\mathrm{imperialgallon}\approx 4\mathrm{imperialquart}$

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 ⁢ imperialgallon ≈ 84 ⁢ imperialquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial quart is equal to 0.0119047619047619 times 21 imperial gallons.

It can also be expressed as: 21 imperial gallons is equal to $\frac{1}{\mathrm{0.0119047619047619}}$ imperial quarts.

Approximation

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