138 imperial gallons in US gallons

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

We know (by definition) that: $1\mathrm{imperialgallon}\approx 1.20094992550486\mathrm{usgallon}$

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: 138 ⁢ imperialgallon ≈ 165.73108971967068 ⁢ usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 0.00603387090310861 times 138 imperial gallons.

It can also be expressed as: 138 imperial gallons is equal to $\frac{1}{\mathrm{0.00603387090310861}}$ US gallons.

Approximation

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