90 US customary cups in US gallons

Conversion formula
How to convert 90 US customary cups to US gallons?

We know (by definition) that: $1\mathrm{uscup}\approx 0.0625\mathrm{usgallon}$

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: 90 ⁢ uscup ≈ 5.625 ⁢ usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 0.177777777777778 times 90 US customary cups.

It can also be expressed as: 90 US customary cups is equal to $\frac{1}{\mathrm{0.177777777777778}}$ US gallons.

Approximation

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