Week Numbers base on Date Range

is there a way to get the week numbers from a date range?

if a have a date range : 1/1/2017 - 2/1/2017, what Week Numbers those dates belong to??

I'm not sure if this will work in all cases but try this with your start date in A1 and end date in B1:

=IF(A$1+(ROWS(A$1:A1)-1)*7<=B$1,WEEKNUM(A$1+(ROWS(A$1:A1)-1)*7),"")

Im getting the "" result.

two cells. one is "start date" and the other one "end date"