138 US customary cups in imperial gallons

Conversion formula
How to convert 138 US customary cups to imperial gallons?

We know (by definition) that: $1\mathrm{uscup}\approx 0.0520421365393118\mathrm{imperialgallon}$

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

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

Conclusion: 138 ⁢ uscup ≈ 7.1818148424250285 ⁢ imperialgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial gallon is equal to 0.139240571073027 times 138 US customary cups.

It can also be expressed as: 138 US customary cups is equal to $\frac{1}{\mathrm{0.139240571073027}}$ imperial gallons.

Approximation

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