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Calculate numbers of days between milestones


I work with items that i add everyday in my SP list. The ID column gives them a unique number. 


I'm looking for a formula that would show me how many days there were between the item ID'ed #1 and the one ID'ed #101, bewteen #101 and #201 and so on...


Can i adapt a formula which gives number of days between dates ? If so, any input pls ?

Super User
Super User

I don't that one is suitable to my needs.


The formula has to find every 100th item from a list of 2000 and counting.


Then it has to calculate the date between them :

==> how many days from ID#1 to ID#101, betwen #101 to #201 etc etc.

Hi @dunnno ,


Can you share some example data and expect result even if you can hand draw it.


Or, you can refer this example.

First, separate out your ids and tag them with the formula #1 to #100. Like below.


Second, calculate the number of days between using the measure.

Measure = VALUE(MAX('Table'[date])-MIN('Table'[date]))

Pbix in the end you can refer.

Best Regards

Community Support Team _ chenwu zhu


If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.




I'd like a formula, or formulaS if it needs several to do it, to fetch every 100th item and calculate the number of days between them.



Between the items #1 and #100, there's 46 days,

Between the items #100 and #200, there's 32 days,




I'd like to know how many days there are between an item #1 and #100 and so on.


For example, let's say i make support tickets each time i receive a call from a customer.

Is it possible for a formula to find every hundrenth ticket and calculate the difference in days between the previous hundrenth one ?


Here in my table, between ID#1 and ID#100, there's 46 days, #100 to #200 there's 27 days etc.

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