642 US customary teaspoons in US customary cups

Conversion formula
How to convert 642 US customary teaspoons to US customary cups?

We know (by definition) that: $1\mathrm{usteaspoon}\approx 0.0208333333333333\mathrm{uscup}$

We can set up a proportion to solve for the number of US customary cups.

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

Conclusion: 642 ⁢ usteaspoon ≈ 13.374999999999979 ⁢ uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 0.0747663551401869 times 642 US customary teaspoons.

It can also be expressed as: 642 US customary teaspoons is equal to $\frac{1}{\mathrm{0.0747663551401869}}$ US customary cups.

Approximation

An approximate numerical result would be: six hundred and forty-two US customary teaspoons is about thirteen point three eight US customary cups, or alternatively, a US customary cup is about zero point zero seven times six hundred and forty-two US customary teaspoons.