21 US customary cups in dry quarts

Conversion formula
How to convert 21 US customary cups to dry quarts?

We know (by definition) that: $1\mathrm{uscup}\approx 0.214841751843826\mathrm{dryquart}$

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

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

Conclusion: 21 ⁢ uscup ≈ 4.511676788720346 ⁢ dryquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 dry quart is equal to 0.221647083075655 times 21 US customary cups.

It can also be expressed as: 21 US customary cups is equal to $\frac{1}{\mathrm{0.221647083075655}}$ dry quarts.

Approximation

An approximate numerical result would be: twenty-one US customary cups is about four point five zero dry quarts, or alternatively, a dry quart is about zero point two two times twenty-one US customary cups.