Smogon-Style Damage Calculator
Use this simplified Pokémon damage calculator to estimate min/max rolls and KO odds based on common Smogon battle assumptions.
What Is a Smogon Damage Calculator?
A Smogon damage calculator is a tool that helps competitive Pokémon players estimate how much damage one Pokémon can deal to another. Instead of guessing whether a move is a guaranteed KO, a 2HKO, or barely a chip hit, you can calculate realistic ranges before you battle.
Damage calculation is core to team building in tiers like OU, UU, and VGC-style formats. Good players use damage ranges to decide EV spreads, identify safe switch-ins, and plan endgames. If your builder says your defensive pivot survives one hit 100% of the time, that can change your whole line of play.
How Damage Is Determined
Pokémon damage is based on a base equation, then adjusted by multiple modifiers. The key inputs are:
- Attacker level
- Move base power
- Attacking stat (Attack or Special Attack)
- Defending stat (Defense or Special Defense)
- STAB (Same-Type Attack Bonus)
- Type effectiveness (immune, resisted, neutral, super effective)
- Battle modifiers such as weather, burn, screens, critical hits, and abilities/items
The random damage factor (85% to 100%) creates a roll range. That’s why one hit can sometimes KO and sometimes miss the KO by a few HP.
Why Min/Max Damage Matters
Looking at only average damage is dangerous. Competitive decisions usually revolve around extremes:
- Minimum roll: your worst case
- Maximum roll: your best case
- KO probability: how often your roll actually secures the knockout
How to Use This Calculator Correctly
1) Enter realistic battle stats
Use the actual final stats from EVs, IVs, level, and nature. If you use base stats by mistake, your result can be wildly off.
2) Set STAB and type multipliers accurately
STAB is usually 1.5x, or 2x with Adaptability. Type effectiveness can be 0x, 0.25x, 0.5x, 1x, 2x, or 4x depending on matchup.
3) Don’t forget field context
Weather, Reflect/Light Screen, burn, and critical hits dramatically alter outcomes. Competitive games are often decided by these details.
Competitive Use Cases
- EV optimization: hit exact survival benchmarks (e.g., live a Choice Specs hit from full).
- Offensive benchmarks: guarantee key OHKOs or 2HKOs after Stealth Rock.
- Scouting lines: infer opponent spreads from observed damage in battle.
- Endgame planning: determine if your cleaner wins after chip damage.
Common Mistakes Players Make
- Using the wrong attacking category (physical vs special).
- Ignoring burn reduction on physical attackers.
- Forgetting screen effects in doubles or support-heavy singles games.
- Assuming one damage roll result represents all possible rolls.
- Not adjusting for item/ability modifiers.
Final Thoughts
A damage calculator is one of the highest-leverage tools in competitive Pokémon. It turns vague intuition into concrete probabilities. Even a quick range check before a match can sharpen your team and prevent avoidable losses.
Use the calculator above as a fast planning tool, then refine your assumptions with full team context. In competitive play, small percentage edges often decide entire tournament runs.