640 US customary cups in dry quarts

Conversion formula
How to convert 640 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: 640 ⁢ uscup ≈ 137.49872118004865 ⁢ dryquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 dry quart is equal to 0.00727279491341991 times 640 US customary cups.

It can also be expressed as: 640 US customary cups is equal to $\frac{1}{\mathrm{0.00727279491341991}}$ dry quarts.

Approximation

An approximate numerical result would be: six hundred and forty US customary cups is about one hundred and thirty-seven point five zero dry quarts, or alternatively, a dry quart is about zero point zero one times six hundred and forty US customary cups.