Determining the required field size or capacity?

Question

Word

The task is this. There are office document templates in rtf format that are filled in by software. Some of the fields have an incomprehensible length, more precisely, it needs and can be estimated. This should be done at least in order to understand how many lines to allocate for a full name, for example.
Is there a way in Word to find out the number of characters in a certain font that fits in the selection? And also the inverse problem: calculate what size the field should be in order to fit N characters of font X into it.

Answer 1

It's not entirely clear why you need this. If these are rtf-fields (fields), then the document is automatically reversed when the fields are updated. If these are just gaps in the body of the document, then you should probably try to replace them with rtf fields and thus reduce them to the first task :)

Answer 2

It's impossible. in DOS, everything was just that each letter had the same width and height, in Windows the letters have different widths and it is impossible to accurately predict the length of the field. but you can take the average temperature in the hospital and dance from it.