Classically, I've read coax data sheets and transcribed the information into an Excel spreadsheet to do cable loss calculations based upon frequency, cable length and cable type.
Recently, I discovered this online tool for Messi & Paoloni coax: https://messi.it/dati/layout/attivo/calc.asp?l=EN
I've had pretty good results with their coax over the last couple of years (and I really like the design of their cable end connectors), so when the time came to purchase some new coax for a special project (multiple frequency use ranging from 3.5 MHz all the way up to 2.4 GHz) I used the above mentioned tool to pick the right coax for me.
This sounds a bit like and ad, but really it isn't. It was just nice to see something other than the usual spec sheet.
Maybe this tool is of some use to you,
73,
Mike VE7KPZ