138 US customary teaspoons in US customary cups

Conversion formula
How to convert 138 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: 138 ⁢ usteaspoon ≈ 2.8749999999999956 ⁢ uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 0.347826086956522 times 138 US customary teaspoons.

It can also be expressed as: 138 US customary teaspoons is equal to $\frac{1}{\mathrm{0.347826086956522}}$ US customary cups.

Approximation

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