Pokemon Damage Calculator

How Pokemon Damage Is Calculated

The Pokemon damage formula is one of the most complex mechanics in the game. Here's the core formula (Gen 5+):

Damage = floor(floor(floor(2 × Level / 5 + 2) × Power × Attack / Defense) / 50) + 2

Then apply modifiers in order:
× Critical (1.5 if crit)
× Burn (0.5 if physical + burned)
× STAB (1.5 if same type)
× Type Effectiveness (0× to 4×)
× Weather (1.5× / 0.5× for Fire/Water in sun/rain)
× Terrain (1.3× for matching type)
× Item (Life Orb 1.3×, Choice items 1.5×, type items 1.2×)
× Random (0.85 to 1.0)

Understanding Damage Rolls

Due to the random factor (0.85 to 1.0), damage isn't a single number — it's a range. Our calculator shows both the minimum and maximum damage:

• Min damage: The lowest possible roll (0.85× multiplier)
• Max damage: The highest possible roll (1.0× multiplier)
• OHKO: One-Hit KO — max damage exceeds defender's HP
• 2HKO: Two-Hit KO — need two hits to KO (min × 2 ≥ HP)

Key Damage Modifiers

STAB (Same Type Attack Bonus)

When a Pokemon uses a move that matches its type, the move gets a 1.5× power boost. For example, Charizard (Fire/Flying) using Flamethrower gets 1.5× damage. With the Adaptability ability, STAB becomes 2.0× instead.

Type Effectiveness

Type matchups multiply damage:

• Super effective (2×): Attacker's type is strong against defender's type
• Double super effective (4×): Both of defender's types are weak
• Not very effective (0.5×): Attacker's type is resisted
• Double resisted (0.25×): Both types resist
• Immune (0×): Defender is immune to the attack type

Weather Effects

Critical Hits

Critical hits deal 1.5× damage (Gen 5+) and ignore negative stat changes on the attacker and positive stat changes on the defender. Base crit rate is 1/24 (Gen 6+), increased by high-crit moves (1/8), Focus Energy (1/2), and Scope Lens (1/8).

Damage Calculator Tips

• Always check both min and max damage — a roll might not KO when you expect it to
• Factor in entry hazards (Stealth Rock, Spikes) when calculating if a switch-in can survive
• Remember that Leftovers recovery happens after damage, potentially changing KO thresholds
• Choice items boost the attack stat, not the move power — this matters for multipliers
• Burn halves physical damage — always account for it when a burned Pokemon attacks
• Life Orb boosts damage by 30% but costs 10% HP per hit — factor this into survivability

Best Pokemon Damage Calculators Compared

Based on community consensus from competitive Pokemon communities, here's how the top damage calculators compare. Reddit users on r/PokemonChampions and r/stunfisk consistently rank the Pokemon Showdown damage calculator as the gold standard.