15 US customary cups in imperial gallons

Conversion formula
How to convert 15 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: 15 ⁢ uscup ≈ 0.780632048089677 ⁢ imperialgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial gallon is equal to 1.28101325387185 times 15 US customary cups.

It can also be expressed as: 15 US customary cups is equal to $\frac{1}{\mathrm{1.28101325387185}}$ imperial gallons.

Approximation

An approximate numerical result would be: fifteen US customary cups is about zero point seven eight imperial gallons, or alternatively, a imperial gallon is about one point two eight times fifteen US customary cups.