639 US customary teaspoons in dry quarts

Conversion formula
How to convert 639 US customary teaspoons to dry quarts?

We know (by definition) that: $1\mathrm{usteaspoon}\approx 0.00447586983007971\mathrm{dryquart}$

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: 639 ⁢ usteaspoon ≈ 2.860080821420935 ⁢ dryquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 dry quart is equal to 0.349640469077089 times 639 US customary teaspoons.

It can also be expressed as: 639 US customary teaspoons is equal to $\frac{1}{\mathrm{0.349640469077089}}$ dry quarts.

Approximation

An approximate numerical result would be: six hundred and thirty-nine US customary teaspoons is about two point eight five dry quarts, or alternatively, a dry quart is about zero point three five times six hundred and thirty-nine US customary teaspoons.