How to convert 644 imperial quarts to US pints?
We know (by definition) that:
We can set up a proportion to solve for the number of US pints.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US pint is equal to 0.000646486168190209 times 644 imperial quarts.
It can also be expressed as: 644 imperial quarts is equal to US pints.
An approximate numerical result would be: six hundred and forty-four imperial quarts is about one thousand, five hundred and forty-six point eight one US pints, or alternatively, a US pint is about zero times six hundred and forty-four imperial quarts.
 The precision is 15 significant digits (fourteen digits to the right of the decimal point).Results may contain small errors due to the use of floating point arithmetic.