D&D 3e to GURPS Creature Conversion Formulas:

(For using creatures from the Monster Manual, etc. in GURPS)

ST                    = Str

DX                   = Dex/2 + 5

IQ                    = Int/2 + 5

HT                   = Con/2 + 5

Hits                  = hp/2 + 5*

Move               = Speed/5

Dodge              = DX/2

DR                   = Natural armor (or dmg. res.)/2

PD                   = DR/2 (up to 4)

D6 Damage:

Cr.       = Average damage/4

Cut.      = Average damage/5

Imp.     = Average damage/6

Skill Rolls         =  Skill ranks/2 + 10

Will Roll           = Wis/2 + 5

Reaction Mod. = Cha/2 – 5

Innate Abilities  = As appropriate

 

To Hit Modifiers For Size:

Fine                  -8

Diminutive        -5

Tiny                  -3

Small                -1

Medium            0

Large               +2

Huge                +3

Gargantuan       +6

Colossal           +10     

 

Shock Modifiers:

31-50 Hits        -1 DX per 2 damage

51-100 Hits      -1 DX per 3 damage

101-200 Hits    -1 DX per 4 damage

 

* My house rule is that the monster is defeated once below 0 hits. For standard rules, try: (Hits = hp/3 + 7)