640 US pints in US gallons

Conversion formula
How to convert 640 US pints to US gallons?

We know (by definition) that: $1\mathrm{uspint}\approx 0.125\mathrm{usgallon}$

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 ⁢ uspint ≈ 80.0 ⁢ usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 0.0125 times 640 US pints.

It can also be expressed as: 640 US pints is equal to $\frac{1}{\mathrm{0.0125}}$ US gallons.

Approximation

An approximate numerical result would be: six hundred and forty US pints is about zero US gallons, or alternatively, a US gallon is about zero point zero one times six hundred and forty US pints.