I have three columns in my calendar on SharePoint 2013. They are:

  • Truck Number
  • Trailer Number
  • Service Type

I am currently using a calculated formula column that states; =[Truck Number]&" "&[Service Type] so now on my calendar when someone selects from drop down of Truck and service it comes up on the calendar. How do I add into this formula the Trailer number if the user happens to select it? Thanks all!

  • where do you want it? at the end?
    – Keerthi
    Jul 7, 2015 at 18:19
  • 1
    =[Truck Number]&" "&[Service Type]&" "&[Service Number] Jul 7, 2015 at 19:41

1 Answer 1


I presume your issues is the [Trailer Number] field is a Lookup field, and Lookup fields can not be referenced in a Calculated Column.

A workaround is to create a SharePoint Designer workflow which on Item Change takes the value from the [Trailer Number] Lookup field and writes it to another Text field, which you can then reference in your Formula.

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