ADV OU Field Guide
🧮 Gen 3 Damage Calculator
Tools

Gen 3 Damage Calculator

A faithful Gen 3 (ADV, level 100) damage calculator. Pick an attacker and defender, set EVs / nature / item / boost stage, and a move — it returns the full 16-roll spread, the % of the defender's HP, and the KO conclusion. The math mirrors the cartridge integer truncation exactly.

Attacker

TyranitarRockDark

Move

RockPhysical

Defender

SkarmorySteelFlying
50.9% – 60.1%2HKO (guaranteed)
Damage: 138–163 / 271 HPSTAB×1 effectiveA 403 vs D 316
16 damage rolls (85–100)138, 140, 141, 143, 145, 146, 148, 149, 151, 153, 154, 156, 158, 159, 161, 163

Notes

  • STAB and type effectiveness are detected automatically from the chosen species' types and the move's type.
  • Effectiveness uses a built-in Gen-3 type chart (×4 / ×2 / ×1 / ×½ / ×¼ / immune; no Fairy type).
  • Boost stages apply the standard stage multiplier to the attacking stat before damage.
  • All stats assume 31 IVs at level 100.