How to convert 138 US customary cups to US dry barrels?
We know (by definition) that:
We can set up a proportion to solve for the number of US dry barrels.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US dry barrel is equal to 3.54150197628458 times 138 US customary cups.
It can also be expressed as: 138 US customary cups is equal to US dry barrels.
An approximate numerical result would be: one hundred and thirty-eight US customary cups is about zero point two eight US dry barrels, or alternatively, a US dry barrel is about three point five four times one hundred and thirty-eight US customary cups.
 The precision is 15 significant digits (fourteen digits to the right of the decimal point).Results may contain small errors due to the use of floating point arithmetic.