Dark Sun THAC0 & Initiative Calculator

THAC0 Calculator

Attacker Information

Hit Probability: +0
Damage Adjustment: +0

Combat Modifiers

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Initiative Calculator

Character Information

Action Information

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Damage Calculator

Weapon Information

Damage Modifiers

Select a weapon to see damage information

Reference Tables

Situational Modifiers

Situation Modifier
Attacker on higher ground +1
Defender invisible -4
Defender off-balance +2
Defender sleeping or held Automatic hit
Defender stunned or prone +4
Defender surprised +1
Missile fire, long range -5
Missile fire, medium range -2
Rear attack +2

Weapon Material Modifiers

Material Cost Weight To Hit Damage
Steel 100% 100% — —
Bronze or agafari 50% 100%/50% -1 —
Bone or chitin 5% 50% -1 -1
Stone or obsidian 3% 75% -2 -1
Wood 1% 50% -3 -2

Action Modifiers

Specific Situation Modifier
Attacking with weapon Weapon speed
Breath weapon +1
Casting a spell Casting time
Innate spell ability +3

Magical Items

Item Type Modifier
Miscellaneous Magic +3
Potion +4
Ring +3
Rod +1
Scroll Casting time of spell
Staff +2
Wand +3

Monster Size (for natural weapons)

Size Modifier
Tiny 0
Small +3
Medium +3
Large +6
Huge +9
Gargantuan +12

Dexterity Score Effects

Score Reaction/Attack Adj. Defense Adj.
3 -3 +4
4 -2 +3
5 -1 +2
6 0 +1
7-14 0 0
15 0 -1
16 +1 -2
17 +2 -3
18 +2 -4
19 +3 -4

Strength Score Effects

Score Hit Prob. Dam. Adjust.
1 -5 -4
2 -3 -2
3 -3 -1
4-5 -2 -1
6-7 -1 0
8-9 0 0
10-11 0 0
12-13 0 0
14-15 0 0
16 0 +1
17 +1 +1
18 +1 +2
18/01-50 +1 +3
18/51-75 +2 +3
18/76-90 +2 +4
18/91-99 +2 +5
18/00 +3 +6
19 +3 +7
20 +3 +8
21 +4 +9
22 +4 +10
23 +5 +11
24 +6 +12
25 +7 +14

Melee Weapons

Weapon Speed
Dagger 2
Short sword 3
Long sword 5
Two-handed sword 10
Battle axe 7
Great axe 9
Club 4
Mace 7
Spear 6
Pike 13

Ranged Weapons

Weapon Speed
Short bow 7
Long bow 8
Light crossbow 7
Heavy crossbow 10
Sling 6
Dart 2
Javelin 4