642 US gallons in US customary cups

Conversion formula
How to convert 642 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: 642 ⁢ usgallon ≈ 10272 ⁢ uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 9.73520249221184e-05 times 642 US gallons.

It can also be expressed as: 642 US gallons is equal to $\frac{1}{\mathrm{9.73520249221184e-05}}$ US customary cups.

Approximation

An approximate numerical result would be: six hundred and forty-two US gallons is about ten thousand, two hundred and seventy-two US customary cups, or alternatively, a US customary cup is about zero times six hundred and forty-two US gallons.