138 metric teaspoons in US customary cups

Conversion formula
How to convert 138 metric teaspoons to US customary cups?

We know (by definition) that: $1\mathrm{brteaspoon}\approx 0.0211337641886519\mathrm{uscup}$

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 ⁢ brteaspoon ≈ 2.916459458033962 ⁢ uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 0.342881502173913 times 138 metric teaspoons.

It can also be expressed as: 138 metric teaspoons is equal to $\frac{1}{\mathrm{0.342881502173913}}$ US customary cups.

Approximation

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