639 imperial cups in imperial quarts

Conversion formula
How to convert 639 imperial cups to imperial quarts?

We know (by definition) that: $1\mathrm{brcup}\approx 0.25\mathrm{imperialquart}$

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

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

Conclusion: 639 ⁢ brcup ≈ 159.75 ⁢ imperialquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial quart is equal to 0.00625978090766823 times 639 imperial cups.

It can also be expressed as: 639 imperial cups is equal to $\frac{1}{\mathrm{0.00625978090766823}}$ imperial quarts.

Approximation

An approximate numerical result would be: six hundred and thirty-nine imperial cups is about zero imperial quarts, or alternatively, a imperial quart is about zero point zero one times six hundred and thirty-nine imperial cups.