421 US gallons in US customary cups

Conversion formula
How to convert 421 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: 421 ⁢ usgallon ≈ 6736 ⁢ uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 0.000148456057007126 times 421 US gallons.

It can also be expressed as: 421 US gallons is equal to $\frac{1}{\mathrm{0.000148456057007126}}$ US customary cups.

Approximation

An approximate numerical result would be: four hundred and twenty-one US gallons is about six thousand, seven hundred and thirty-six US customary cups, or alternatively, a US customary cup is about zero times four hundred and twenty-one US gallons.