Convert date to Wyy(week number) Format

Question

I am working with Excel 2010. I wish to convert (for example) cell A1 with today's date in the format 4/10/2017 to a format which is W1715 (W(last two digits of year)(weeknumber)). It would be great if anyone could help! Thanks in Advance.

Answer 1

If A1 has the Date and is formatted as Date (Excel recognize it as Date) just write in B1 where you want the result:
="W"&VALUE(RIGHT(YEAR(A1),2))&WEEKNUM(A1,1)
Right(Year(A1),2) returns the last 2 digits of the four digit of the Year
Weeknum returns the number of the week 1 correspond at 1st week is the week which has the 1st of January week begins on Sunday