# Formula query

#### james_simpson1998

##### New Member
Hi people,

What I am trying to do is this, this is an example so not the exact wording:

Cell A4 contains a week number, example 40.
Entering forumla into cell A6: If cell A1 equals "A" and cell A2 equals "B", convert cell A4 into week number date, i.e week 40 = 28/09/2020.

is there a formula that can do this please?

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#### Fluff

##### MrExcel MVP, Moderator
Hi & welcome to MrExcel.
=IF(AND(A1="A",A2="B"),DATE(YEAR(TODAY()),1,-2)-WEEKDAY(DATE(YEAR(TODAY()),1,3))+A4*7,"")

#### james_simpson1998

##### New Member
Hi & welcome to MrExcel.
=IF(AND(A1="A",A2="B"),DATE(YEAR(TODAY()),1,-2)-WEEKDAY(DATE(YEAR(TODAY()),1,3))+A4*7,"")
Hi,

thanks for your help. Could I add into the formula if A4 = blank, then A6 = blank?

Thank you.

#### Fluff

##### MrExcel MVP, Moderator
=IF(A4="","",IF(AND(A1="A",A2="B"),DATE(YEAR(TODAY()),1,-2)-WEEKDAY(DATE(YEAR(TODAY()),1,3))+A4*7,""))

#### james_simpson1998

##### New Member

=IF(A4="","",IF(AND(A1="A",A2="B"),DATE(YEAR(TODAY()),1,-2)-WEEKDAY(DATE(YEAR(TODAY()),1,3))+A4*7,""))
Brilliant, thank you.

#### Fluff

##### MrExcel MVP, Moderator
You're welcome & thanks for the feedback.

#### james_simpson1998

##### New Member
Now what if I wanted to take it a step further...

what if i had a separate table on another sheet which told me, for example transit times in weeks. Lets use for example 4 weeks total transit time.

And what I would like to do is to insert a week number into cell M92 for example, and total transit time for this example is 4 weeks which is what is on the table on the other sheet. So, M92 = 35 (for example), i would like P92 to pull through the date of week 35, O92 to pull through P92-4 total weeks from the other table? Does this make sense?

#### Fluff

##### MrExcel MVP, Moderator
As this is now a totally different question, you will need to start a new thread.

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