21 US quarts in dry gallons

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

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

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

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

Conclusion: 21 ⁢ usquart ≈ 4.511676788720346 ⁢ drygallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 dry gallon is equal to 0.221647083075655 times 21 US quarts.

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

Approximation

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