Yes, calculating HP is difficult for creatures because the formula in the core rules is meant strickly for PCs/NPCs

In The Encountered, however, you have to also consider the creature’s size relative to that of a normal Human, and so you need to start by adjusting the base formula by using the multipliers shown in Figure 9.2.  With this, the Kraken is considered Colossal, so would get +75% HP, so base is 181, and adjusted for size is 316 (which does happen to fit for the “average” for that category as shown below).

Section 9.4 goes over each Category and gives the ranges that you should encounter, so a Kraken (a Category 9 creature) should have between 200 and 275 HP - so it’s spot on here (yet Figure 10.3 shows that a Category 9 creature should have an average of 315 HP) by that rating.

So you have to kind of massage your creatures, so to speak, to get them to an appropriate level - personally, I would suggest using the formula first, then see how it compares with the ranges in Section 9.4 - if it is within the range, press on, but if not, adjust accordingly - try by size first, then do what you need to do to tweak the value to where it should be…

as always, ymmv

Sorry it’s been so long, but I now have the category selection working. i.e. choose category 5 and…
Category: 5
Strength:  42   Dice Pool:  2d10+4d8 50 50
Agility:  32   Dice Pool:  4d8+2d6 50 50
Conditioning:  32   Dice Pool:  4d8+2d6 50 50
Vitality:  32   Dice Pool:  4d8+2d6 50 50
Discipline:  37   Dice Pool:  6d8 50 50
Intelligence:  32   Dice Pool:  4d8+2d6 50 50
Charisma:  33   Dice Pool:  4d8+2d6 50 50
Athleticism:  37   Dice Pool:  6d8 Damage Mod: 4
PhysicalAccumen:  32   Dice Pool:  4d8+2d6 Damage Mod: 2
Fitness:  32   Dice Pool:  4d8+2d6
Will:  35   Dice Pool:  5d8+1d6
Wit:  35   Dice Pool:  5d8+1d6
Wisdom:  33   Dice Pool:  4d8+2d6
Presence:  38   Dice Pool:  1d10+5d8
Reaction:  36   Dice Pool:  6d8
Physis:  34   Dice Pool:  5d8+1d6
Defense:  18   Dice Pool:  3d6+3d4
Health:  64
Endurance:  69

That’s what pops out. I don’t think I’m going to do templates or address the health thing because that’s too creature specific and the user needs to decides those things.
Oh, and if anyone wants a copy of the program so far you can PM me.

Sure, I’ll send a PM and check it out.

First run looked good, I sent you a couple of suggestions.