It seems like every time I prepare a conference paper, I wonder how long it should be, in terms of number of pages, so as to correspond to the allotted time. You would think that by now I would have the ratio perfected to a science, but in actual fact, I still find that even when I of a comparable standard length, sometimes I am done before the 20 minutes are up, while other times I still seem to be cutting it down to the wire or skipping things so as to avoid going over.
Do you have a formula that you use for determining the appropriate number of pages for a particular length of talk? There is surprisingly little advice on this subject on the internet, and so if you have the secret formula and are willing to share it, you could become famous! 🙂