I'm trying to calculate the shelf life remaining on an item using the manufactured date & the expiration date. Using the DatedIf function I am attempting to formulate the following: =datedif(mfg_date,expir_date,"m")- this is per every forum I've found. Now when I start to enter the formula, I only get as far as =datedif(mfg_date, before I get an error message. Once I put that comma & click the second cell, the error message occurs. The two date cells are utilizing short date formating so I know that's not the issue here. Any help would be appreciated! Screenshots are attached

cdersarkisian Here's another screen shot that shows the formula works. So I'm wondering if one or both of those dates just appear to dates properly formatted, but are actually text

cdersarkisian Can you then, since none of our suggestions have helped yet, post a copy of the actual spreadsheet?

cdersarkisian On your file formula is without error

cdersarkisian If you open the file attached to my post do you have any errors?

JHarFood , is it differ from =YEARFRAC(E2,TODAY(),1) ?

DatedIf Not Working | Microsoft Community Hub

mathetes
Silver Contributor
Jan 18, 2021
cdersarkisian

Here's another screen shot that shows the formula works.

So I'm wondering if one or both of those dates just appear to dates properly formatted, but are actually text
- cdersarkisian
  Copper Contributor
  Jan 18, 2021
  I formatted them as dates using the cell formatting function so they are definitely dates
  - mathetes
    Silver Contributor
    Jan 18, 2021
    cdersarkisian
    
    Can you then, since none of our suggestions have helped yet, post a copy of the actual spreadsheet?
SergeiBaklan
MVP
Jan 18, 2021
cdersarkisian

Perhaps you shall use semicolon instead of comma as delimiter, depends on your locale.
- cdersarkisian
  Copper Contributor
  Jan 18, 2021
  I'm in the U.S but I did try that- didn't work! SergeiBaklan
Neal__
Copper Contributor
Oct 26, 2022
cdersarkisian

=([end_date]-[start_date])/365.25 (or 30.4375, etc.)

works well enough for most purposes

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DatedIf Not Working