644 US customary cups in dry gallons

Conversion formula
How to convert 644 US customary cups to dry gallons?

We know (by definition) that: $1\mathrm{uscup}\approx 0.0537104379609565\mathrm{drygallon}$

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: 644 ⁢ uscup ≈ 34.58952204685599 ⁢ drygallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 dry gallon is equal to 0.0289104890968245 times 644 US customary cups.

It can also be expressed as: 644 US customary cups is equal to $\frac{1}{\mathrm{0.0289104890968245}}$ dry gallons.

Approximation

An approximate numerical result would be: six hundred and forty-four US customary cups is about thirty-four point five nine dry gallons, or alternatively, a dry gallon is about zero point zero three times six hundred and forty-four US customary cups.