640 imperial quarts in US gallons

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

We know (by definition) that: $1\mathrm{imperialquart}\approx 0.300237481376214\mathrm{usgallon}$

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

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

Conclusion: 640 ⁢ imperialquart ≈ 192.15198808077696 ⁢ usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 0.00520421365393118 times 640 imperial quarts.

It can also be expressed as: 640 imperial quarts is equal to $\frac{1}{\mathrm{0.00520421365393118}}$ US gallons.

Approximation

An approximate numerical result would be: six hundred and forty imperial quarts is about one hundred and ninety-two point one five US gallons, or alternatively, a US gallon is about zero point zero one times six hundred and forty imperial quarts.