21 US quarts in imperial quarts

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

We know (by definition) that: $1\mathrm{usquart}\approx 0.832674184628989\mathrm{imperialquart}$

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 ⁢ usquart ≈ 17.48615787720877 ⁢ imperialquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial quart is equal to 0.0571880916907074 times 21 US quarts.

It can also be expressed as: 21 US quarts is equal to $\frac{1}{\mathrm{0.0571880916907074}}$ imperial quarts.

Approximation

An approximate numerical result would be: twenty-one US quarts is about seventeen point four eight imperial quarts, or alternatively, a imperial quart is about zero point zero six times twenty-one US quarts.