391 US customary cups in imperial cups

Conversion formula
How to convert 391 US customary cups to imperial cups?

We know (by definition) that: $1\mathrm{uscup}\approx 0.832674184628989\mathrm{brcup}$

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

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

Conclusion: 391 ⁢ uscup ≈ 325.5756061899347 ⁢ brcup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial cup is equal to 0.00307148318543441 times 391 US customary cups.

It can also be expressed as: 391 US customary cups is equal to $\frac{1}{\mathrm{0.00307148318543441}}$ imperial cups.

Approximation

An approximate numerical result would be: three hundred and ninety-one US customary cups is about three hundred and twenty-five point five seven imperial cups, or alternatively, a imperial cup is about zero times three hundred and ninety-one US customary cups.