639 imperial gallons in US quarts

Conversion formula
How to convert 639 imperial gallons to US quarts?

We know (by definition) that: $1\mathrm{imperialgallon}\approx 4.80379970201942\mathrm{usquart}$

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

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

Conclusion: 639 ⁢ imperialgallon ≈ 3069.6280095904094 ⁢ usquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US quart is equal to 0.000325772372703047 times 639 imperial gallons.

It can also be expressed as: 639 imperial gallons is equal to $\frac{1}{\mathrm{0.000325772372703047}}$ US quarts.

Approximation

An approximate numerical result would be: six hundred and thirty-nine imperial gallons is about three thousand and sixty-nine point six three US quarts, or alternatively, a US quart is about zero times six hundred and thirty-nine imperial gallons.