688 imperial gallons in US customary cups

Conversion formula
How to convert 688 imperial gallons to US customary cups?

We know (by definition) that: $1\mathrm{imperialgallon}\approx 19.2151988080777\mathrm{uscup}$

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: 688 ⁢ imperialgallon ≈ 13220.056779957458 ⁢ uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 7.56426403187671e-05 times 688 imperial gallons.

It can also be expressed as: 688 imperial gallons is equal to $\frac{1}{\mathrm{7.56426403187671e-05}}$ US customary cups.

Approximation

An approximate numerical result would be: six hundred and eighty-eight imperial gallons is about thirteen thousand, two hundred and twenty point zero five US customary cups, or alternatively, a US customary cup is about zero times six hundred and eighty-eight imperial gallons.