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Message: <blockquote data-quote="SaxonDouglass" data-source="post: 6454917" data-attributes="member: 6781263">I am still waiting for the release of the DMG in my region, but I wanted to chime in on calculating hit dice. I don't think the hit point ranges are to be taken as the rolled minimum and maximum HP for the monster, but instead as the range of average HP values.Take the range above for a Challenge 11 monster (221-235) and assume we want d8 hit dice. We know that the maximum HP is from rolling maximum hit dice (all 8s in this case) and the minimum is from rolling all 1s. So the difference between maximum and minimum hit points gives us the desired range of our roll:     (235-221)/(8-1) = 2Therefore the creature has 2 hit dice of d8s. Then the constant term is:     221-2 = 219Which if we split into hit dice and Con mod gives us a Con mod of +110 (Con score 230). So we give the monster 2d8+219 hit points.This is probably undesirable!Hence the approach outlined by aramis erak should probably be used in preference, which simply gives you the desired average hit points.Note that for a given Challenge rating the calculated hit dice depends on both the die type chosen (presumably corresponding to creature type) and the Con mod (which can be freely adjusted). I would use the minimum HP as my target average when building spellcasting or lurking monsters, and the maximum HP for brutes. In between the two would be soldier and ranged monster types. Then adjust the Con mod to give a desirable number of hit dice (a quick glance at the MM suggests between 1 to 2 hit dice per Challenge level is typical).</blockquote>

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