138 US gallons in US dry barrels

Conversion formula
How to convert 138 US gallons to US dry barrels?

We know (by definition) that: $1\mathrm{usgallon}\approx 0.0327380952380952\mathrm{drybarrel}$

We can set up a proportion to solve for the number of US dry barrels.

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

Conclusion: 138 ⁢ usgallon ≈ 4.517857142857137 ⁢ drybarrel

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US dry barrel is equal to 0.221343873517787 times 138 US gallons.

It can also be expressed as: 138 US gallons is equal to $\frac{1}{\mathrm{0.221343873517787}}$ US dry barrels.

Approximation

An approximate numerical result would be: one hundred and thirty-eight US gallons is about four point five one US dry barrels, or alternatively, a US dry barrel is about zero point two two times one hundred and thirty-eight US gallons.