How to create calculated columns/fields?

[mguilday]

I am brand new to Power BI so this is probably easy and I'm just missing something obvious but I am using the online version of Power BI (my first hunch is maybe this is only available in desktop?) and I have a table where I want to do calculations based on 2 other columns or even something as simple as taking a number (that represents milliseconds) and converting it to minutes.

I found the Power BI documentation for calculated columns and it says to go to the data tab and right click on an object and select add column. This is where I can't for the life of me find where it says add column or anything close to what I want to do. 

Am I missing something or is it just that I need to use Desktop for formulas?

[mguilday]

Thanks Collin! I just needed that confirmation so I can ask my supervisor for a Windows based PC. I'll look into the workaround as well but I feel that if they want me to be able to create without limits, it just makes sense to get Desktop.

[collinq · Accepted solution]

Hey @mguilday ,

At this moment, the best bet is to use desktop to do this.  The Service is starting to get more capabilities but is not quite there yet.  To do it in the Service you would need to have the "edit model" option turned on and then you can select the "Open Data Model".