638 imperial cups in US gallons

Conversion formula
How to convert 638 imperial cups to US gallons?

We know (by definition) that: $1\mathrm{brcup}\approx 0.0750593703440534\mathrm{usgallon}$

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

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

Conclusion: 638 ⁢ brcup ≈ 47.88787827950607 ⁢ usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 0.0208821112132662 times 638 imperial cups.

It can also be expressed as: 638 imperial cups is equal to $\frac{1}{\mathrm{0.0208821112132662}}$ US gallons.

Approximation

An approximate numerical result would be: six hundred and thirty-eight imperial cups is about forty-seven point eight nine US gallons, or alternatively, a US gallon is about zero point zero two times six hundred and thirty-eight imperial cups.