I tried the Micro 100 calculator (thanks MikeC8!) which claims to be a version of HSMAdvisor.

I understand that you need the tip diameter to calculate the feed rate (based on the diameter of the tool path) plus to get the SFM based on cutter RPM. I assume that you need the tool length and neck diameter plus DoC to ensure that you don't break things by feeding too aggressively. The Micro 100 calculator asks for tool length but not the neck diameter. Perhaps I'm missing it (what is "APT"?) but I don't see DoC.