399 US gallons in US customary cups

Conversion formula
How to convert 399 US gallons to US customary cups?

We know (by definition) that: $1\mathrm{usgallon}\approx 16\mathrm{uscup}$

We can set up a proportion to solve for the number of US customary cups.

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

Conclusion: 399 ⁢ usgallon ≈ 6384 ⁢ uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 0.000156641604010025 times 399 US gallons.

It can also be expressed as: 399 US gallons is equal to $\frac{1}{\mathrm{0.000156641604010025}}$ US customary cups.

Approximation

An approximate numerical result would be: three hundred and ninety-nine US gallons is about six thousand, three hundred and eighty-four US customary cups, or alternatively, a US customary cup is about zero times three hundred and ninety-nine US gallons.