640 imperial gallons in imperial quarts

Conversion formula
How to convert 640 imperial gallons to imperial quarts?

We know (by definition) that: $1\mathrm{imperialgallon}\approx 4\mathrm{imperialquart}$

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: 640 ⁢ imperialgallon ≈ 2560 ⁢ imperialquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial quart is equal to 0.000390625 times 640 imperial gallons.

It can also be expressed as: 640 imperial gallons is equal to $\frac{1}{\mathrm{0.000390625}}$ imperial quarts.

Approximation

An approximate numerical result would be: six hundred and forty imperial gallons is about two thousand, five hundred and sixty imperial quarts, or alternatively, a imperial quart is about zero times six hundred and forty imperial gallons.