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Damage calculator

Shin Megami Tensei II

Pick who attacks and who is hit, then the attack. 101Leafy researched the game and the calculator follows its formulas step by step: every division rounds down, and the last step takes a random amount off, so a hit lands anywhere in the range shown.

Attacker
Defender

Worked examples

The hero with an Attack Knife against a Zombie Dog

  1. The hero is level 6 with St 6. With the Attack Knife (attack 9) the weapon attack is 6/2 + 6 + 9 = 18.
  2. 18 × (18/4 + 4) = 18 × 8 = 144.
  3. The Zombie Dog is level 1 with Vi 2, so its defense is (1 + 2) × 2 = 6, and 144 / 6 = 24.
  4. The moon never changes the hero's damage, and the Zombie Dog takes normal melee damage, so it stays 24.
  5. The random step takes off up to 24 × 31 / 128 = 5, so the hit does 19 to 24.

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A Zombie Dog attacking the hero at full moon

  1. The Zombie Dog is level 1 with St 3, so its attack is (1 + 3) × 2 = 8, and 8 × (8/4 + 4) = 48.
  2. The hero is level 6 with Vi 6 and Ag 6 and wears the Headgear, Survival Vest, Leather Gloves, and Leather Boots (4 + 8 + 2 + 2 = 16). Defense is 16 + (6/2 + 6 + 6) / 2 = 23, and 48 / 23 = 2.
  3. At full moon the Zombie Dog's damage is 10/16, so 2 × 10 / 16 = 1.
  4. The random step can't take anything off 1, so the hit does 1 damage, the same as in the game.

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