I am working in a calculate column that should calculate the time minus x minutes based on another date-time column.

I have a start date column of type date-time and I need calculate that time minus x minutes in the calculate column. Now the tryck is that the user will insert the amount of minutes in another column.

So the list looks like this:

StartTime                AmountOfMinutes           EndDate (calculated column)
2019-03-28 09:00:00          10                    2019-03-28 08:50:00

I found a formula that extract 15 minutes and it looks like this:


The 4 in the formula represent 15 minutes. I need to use the user inserted time instead the 4 in the forumla. Or find some another way. After that a Flow will get trigged at the EndDate time. (MS Flow).

How can I use the user selected amount of minutes in the formula?

Best regards Americo

  • Hi Americo, did below answer helped?
    – P S
    Commented Mar 28, 2019 at 11:39
  • Yes, see my comment down! Commented Mar 28, 2019 at 13:26

1 Answer 1


You can create formula like this:


1440 is number of minutes in a day. I just tested this in my environment and it worked.

For reference: http://blog.pentalogic.net/2010/05/calculated-columns-adding-hours-onto-a-date-field/

  • A more user intuitive way may be ‘=StartTime-minutes/60/24’ to know a bit more on where the 1440 is coming from
    – KGlasier
    Commented Mar 27, 2019 at 12:45
  • Hi, Sorry I forgot mark the answer. Yes it worked. Thanks a lot Commented Mar 28, 2019 at 11:56

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