640 centiliters in US gallons

Conversion formula
How to convert 640 centiliters to US gallons?

We know (by definition) that: $1\mathrm{centiliter}\approx 0.00264172052358148\mathrm{usgallon}$

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 ⁢ centiliter ≈ 1.6907011350921473 ⁢ usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 0.59147059125 times 640 centiliters.

It can also be expressed as: 640 centiliters is equal to $\frac{1}{\mathrm{0.59147059125}}$ US gallons.

Approximation

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