645 dry quarts in US quarts
Result
The conversion result is: 645 dry quarts is equivalent to 750.552435064935 US quarts.[1]
Conversion formula
How to convert 645 dry quarts to US quarts?
We know (by definition) that: 1 dryquart ≈ 1.16364718614719 usquart.
We can set up a proportion to solve for the number of US quarts.
1 dryquart / 645 dryquart ≈ 1.16364718614719 usquart / x usquart
Now, we cross multiply to solve for our unknown x:
x usquart ≈ (645 dryquart / 1 dryquart) * 1.16364718614719 usquart → x usquart ≈ 750.5524350649375 usquart
Conclusion:
645 dryquart ≈ 750.5524350649375 usquart

Conversion in the opposite direction
The inverse of the conversion factor is that 1 US quart is equal to 0.00133235194941908 times 645 dry quarts.
It can also be expressed as: 645 dry quarts is equal to 1 / 0.00133235194941908 US quarts.
Approximation
An approximate numerical result would be: six hundred and forty-five dry quarts is about seven hundred and fifty point five four US quarts, or alternatively, a US quart is about zero times six hundred and forty-five dry quarts.
Footnotes
[1] 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.