638 imperial gallons in dry gallons

Conversion formula
How to convert 638 imperial gallons to dry gallons?

We know (by definition) that: $1\mathrm{imperialgallon}\approx 1.0320567434887\mathrm{drygallon}$

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

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

Conclusion: 638 ⁢ imperialgallon ≈ 658.4522023457906 ⁢ drygallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 dry gallon is equal to 0.00151871312213311 times 638 imperial gallons.

It can also be expressed as: 638 imperial gallons is equal to $\frac{1}{\mathrm{0.00151871312213311}}$ dry gallons.

Approximation

An approximate numerical result would be: six hundred and thirty-eight imperial gallons is about six hundred and fifty-eight point four five dry gallons, or alternatively, a dry gallon is about zero times six hundred and thirty-eight imperial gallons.