Is it possible in survey123 to pull data (for example, I already have the height of the cylinder) add it into some of my calculations? Is there a way to do that?
Yes it is. The key consideration is 'where is the data coming from'? You can either pre-fill information into a field using the App URL schema: Understanding Survey123's custom URL Scheme, or have a CSV file accompany the survey with lookup information being retrieved by the pulldata function: Use existing data in your survey - the pulldata( ) function
Retrieving data ...