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What is the Pokémon Damage Calculator?
Pokémon Damage Calculator is a browser-based tool for estimating how much damage one Pokémon's move will do to another. You pick a generation, configure both Pokémon (level, stats, ability, item, nature, status, field conditions), choose a move, and it returns a damage range as a percentage of the defender's HP. Its distinguishing feature is breadth: the selector lists generations from Gen 1 (Red/Blue/Yellow) through Gen 9 (Scarlet/Violet), including side games and variants such as Crystal, Emerald, FR/LG, B2/W2 Hardmode, OR/AS, BD/SP and US/UM, with interface languages including English, Italian, German, Spanish, French and Japanese.
What you can actually do with it
- Check whether a hit KOs. Enter the defender's current HP and see whether the damage range covers it, which is the core question in most competitive matches.
- Compare builds. Adjust EVs, IVs, nature or item and re-run the same move to see how a spread change shifts the damage range.
- Model edge cases. The form exposes controls for critical hits, Z-moves, multi-hit counts (2–5 hits), stat stages from +6 to -6, Dynamax, Tera Type, forme, gender, and doubles-related ability states such as "Zero allies fainted" through "Five allies fainted."
- Work in older mechanics. Gen 1 and Gen 2 use DVs and Stat EXP rather than IVs and EVs, and the Special stat is split out separately — useful if you play retro formats where those rules apply.
Who it suits
Competitive players teambuilding for a specific generation benefit most, since the same tool covers the whole series rather than forcing you to switch sites per era. Casual players checking "can my Pokémon survive this?" will find it heavier than needed — the number of fields is large, and results only appear once JavaScript runs (the page notes that a stalled "Copied" message usually means JavaScript is disabled).
A practical next step: before trusting a result, confirm the generation selector matches your format, since mechanics like the physical/special split, critical-hit rates and stat formulas differ by generation. Then set the defender's HP to its actual in-battle value rather than its maximum, because KO judgments hinge on remaining HP.
How do I calculate damage for a specific generation like Gen 9 or Gen 1?
Select the generation first, then build both Pokémon and read the move-by-move results. On Pokémon Damage Calculator, the page lists Gen 1 through Gen 9 (including Gen 3 Emerald and FR/LG, Gen 4 Platinum and HG/SS, Gen 5 B2/W2 Hardmode, Gen 6 OR/AS, Gen 8 BD/SP, and Gen 9 S/V), so the mechanics change with that single choice.
A practical sequence
- Pick the generation from the top selector, including the specific game version where offered.
- Set Pokémon 1: species, level, nature, ability, item, status, current HP, and stat values (base, IVs/DVs, EVs, plus stat stages from -6 to +6).
- Set Pokémon 2 the same way, including its ability and item.
- Choose the move, then apply modifiers: physical/special, critical hit, Z-move, and multi-hit counts.
- Read the damage range per move; the page shows results like "??? - ???%" until data loads, so wait for the numbers to resolve.
For Gen 1, expect different fields to matter: DVs and Stat EXP replace IVs and EVs, and the Special stat is single rather than split into Sp. Atk and Sp. Def. Gen 2 keeps DVs but adds the split Special stats. From Gen 3 onward, IVs and EVs apply, and later generations add abilities, items, Tera Type, Dynamax, and forme options. If a field does not appear to affect the result, check that it belongs to the selected generation.
Example
To check whether a Gen 9 Timid special attacker with a Life Orb can OHKO a bulky physical wall after one Calm Mind, select Gen 9 S/V, enter both sets with exact EVs and natures, pick the special move, and compare the high end of the damage range against the defender's current HP. For a Gen 1 comparison, switch to R/B/Y and re-enter DVs and Stat EXP instead of IVs and EVs.
Decision criteria
- Use the exact game version when the page offers one, since movepools and mechanics can differ within a generation.
- Trust the range, not a single number: rolls, crits, and multi-hit counts widen it.
- Use current HP and status fields to model mid-battle scenarios rather than only full-health matchups.
If you want to cross-check a result, Pokémon Showdown Damage Calculator is a well-known alternative, but confirm its generation options match yours before comparing outputs.
How do I factor in abilities, items, and field conditions like weather when calculating damage?
Select the ability, held item, status and field conditions in the calculator's input panels before reading the damage range; on this site those controls sit alongside each Pokémon's stats rather than in a separate "modifiers" step. The page also exposes weather-adjacent and battle-state options such as Dynamax, Tera Type, fainted allies and stat stages, so the practical workflow is to set the battle state first, then compare move results.
What to set, and why it matters
| Input | Where it appears on the page | Typical effect on the result |
|---|---|---|
| Ability | Per-Pokémon ability selector | Can change damage outright (e.g. boosting or halving certain move types) or change how stats are read |
| Item | Per-Pokémon item field | Often a flat multiplier on attacking or defending damage; some items only apply under conditions |
| Weather / terrain | Field or battle-condition settings | Multiplies or reduces moves of matching types and can alter which moves are boosted |
| Status | Healthy, Poisoned, Badly Poisoned, Burned, Paralyzed, Asleep, Frozen | Burn cuts physical damage; paralysis and sleep mainly affect speed and turn order |
| Stat stages | +6 to -6 sliders for each stat | Directly change the effective Attack, Defense, Sp. Atk, Sp. Def and Speed used in the formula |
| Field state | Fainted allies, Dynamax, Tera Type, critical hit toggle, multi-hit count | Alters modifiers, hit count, or whether the attack is forced to crit |
A concrete reader scenario
Suppose you want to know whether a burned physical attacker with a Choice Band can still 2HKO a defensive wall after one Swords Dance. Set the attacker's status to Burned (halving physical damage), add the item, raise Attack to +2, then check the defender's ability and item before reading the percentage. If the result sits near 50%, toggle the critical hit box to see how much a crit shifts the range, since crits ignore some stat stages.
Decision criteria
- Set the defending side as carefully as the attacking side. Abilities and items on the defender often matter more than the attacker's, because many defensive abilities apply flat reductions.
- Change one variable at a time. Compare the same move with and without weather or the item so you can attribute the difference.
- Use the stat-stage sliders rather than editing raw stats. This keeps the calculation consistent with in-battle boosts.
- Check generation first. The page starts with a generation selector from Gen 1 through Gen 9; mechanics like the Special stat, DVs versus IVs, and Tera Type only exist in specific generations, so a modifier that seems to do nothing may simply not apply to the selected generation.
For a second opinion or a cross-check on unusual interactions, compare against another calculator such as Pokémon Showdown Damage Calculator and note any difference in the assumptions each makes.
How do I use the calculator to determine if my Pokémon can survive a specific attack?
Set the defending Pokémon in either slot, enter the attacker's exact set and move, then read the damage range against the defender's current HP. Survival is decided by the lowest number in that range: if the minimum damage is below the defender's HP, it survives at least one hit; if the minimum meets or exceeds HP, the hit is a guaranteed KO.
Working through a scenario
Suppose you want to know whether a bulky Water-type survives a strong physical hit. Enter the defender's species, Ability, Item, Nature, EVs/IVs, and current HP, then set the attacker's stats and the chosen move. The detailed results show a percentage range, and the site's HP field (shown as current HP out of a maximum) lets you test a damaged Pokémon rather than only a full-health one.
- Survives comfortably: minimum damage is well under current HP, so no further investment is needed.
- Borderline: minimum is just below HP but the maximum exceeds it — the outcome depends on damage rolls, so treat it as unreliable.
- Guaranteed KO: minimum damage equals or exceeds HP; adjust EVs, Nature, Item or Ability and recalculate.
Details that change the answer
The page exposes the modifiers that most often flip a result, so match them to your real battle:
| Modifier | When it matters |
|---|---|
| Weather and terrain | Boost or cut certain move types |
| Critical hit toggle | Tests worst-case and best-case rolls |
| Stat stages (+6 to -6) | Reflects boosts, drops and Intimidate |
| Status (burn, poison, paralysis) | Burn halves physical damage; paralysis affects Speed |
| Multi-hit and Z-move options | Changes total damage for those moves |
| Generation selector | Mechanics differ across Gen 1–9, so pick the right one |
For a doubles player, the "allies fainted" setting matters because some Abilities scale with fallen teammates. The critical-hit toggle is the most useful check when a result sits near the survival threshold.
Practical next step
Run the calc twice: once at full HP and once at the HP your Pokémon realistically has after switching in with hazards or a prior hit. If the borderline case worries you, nudge a few EVs from offense into HP or Defense and recalculate until the minimum damage falls below your HP. For set ideas and usage context, compare against community references such as Smogon before finalizing spreads.
What do the damage percentages and KO chances shown in the results mean?
The percentages estimate how much of the defender's current HP one attack would remove, and the KO chance is the probability that the attack knocks the target out under the conditions you entered. Each move in the results shows a range (for example, a low-to-high damage roll) rather than a single number, because damage varies slightly from turn to turn. The KO chance translates that range into odds: a move that always deals at least the target's remaining HP reads as a guaranteed KO, while one that only sometimes reaches it shows a partial chance.
On Pokémon Damage Calculator, these figures come from everything you set on the page — the generation, both Pokémon's stats, level, nature, EVs/IVs, ability, item, status, field conditions and the move itself. Because the calculator supports multiple generations (Gen 1 through Gen 9, including regional variants and mechanics like Dynamax, Tera types and Z-moves), the same matchup can produce different percentages depending on which generation you select. The results also break damage down per move, so you can compare options side by side.
Reading the numbers in practice
- Damage percentage: the share of the defender's current HP lost. If the target is already damaged, the percentage is measured against that reduced HP, not its maximum.
- Damage range: the spread between the lowest and highest roll. A narrow range means predictable damage; a wide one means the outcome depends on luck.
- KO chance: the likelihood the attack finishes the target this turn. Treat anything below 100% as a gamble, and note whether the chance reflects one hit or a multi-hit move.
A concrete scenario
Suppose you are deciding whether a sweeper can OHKO a bulky wall before it retaliates. Enter the wall's full HP, Defense and any defensive item, then check the sweeper's main move. If the KO chance is high, you can attack immediately; if it is low but the damage range nearly covers the HP, chip damage from hazards or a prior hit may push it over the threshold. Re-running with the wall at reduced HP shows how that changes the odds.
Choosing what to trust
Use the KO chance as a decision aid, not a guarantee. It assumes the exact conditions you entered, so double-check the level, nature, EV spread and held items on both sides — a small input error shifts the percentages. For competitive planning, compare several moves and note which give the most reliable KO chance against the threats you expect.
How does the calculator handle special mechanics like Dynamax, Tera Types, and critical hits?
The calculator treats these as per-Pokémon or per-move switches rather than assuming defaults. On the Pokémon side, each set has a Dynamax toggle and a Tera Type field alongside level, nature, ability, item and status. On the move side, each move slot carries its own Physical/Special/Crit/Z-move controls plus multi-hit counts and roll options, so a critical hit or Z-move can be forced for one move without changing the others.
What each switch does in practice
- Dynamax: a checkbox on the Pokémon entry. Turn it on when you want damage computed as if that Pokémon were Dynamaxed; leave it off for standard matchups.
- Tera Type: a separate field from the Pokémon's base typing. This lets you test a set that has already Terastallized, which matters when a defensive Tera changes the type chart or an offensive Tera changes STAB.
- Critical hit: a per-move toggle, shown next to the Physical/Special and Z-move options. Use it to compare a normal hit against a guaranteed crit, for example when judging whether a bulky set survives a crit from a faster attacker.
- Z-move: also per-move, useful for older generations where Z-moves exist; it sits alongside the crit toggle and hit-count options.
- Multi-hit and roll controls: each move slot has 2–5 hit selectors and Once/Twice/3–5 times roll settings, so you can check both the average and the worst-case number of hits.
A concrete workflow
Suppose you are building a defensive Pokémon for a Gen 9 ladder team and want to know if it survives a common attacker. Enter the attacker's set, set its Tera Type to what players usually run, toggle Crit on the main move, and read the damage range. Then flip Dynamax on the defender to see whether the bulk holds under that mechanic. Because the controls are per-slot, you can keep a second move unequipped with crit and compare the two results side by side.
Decision criteria
Use the crit toggle when the question is about reliability, not raw power: a set that only survives non-crits is a different recommendation from one that survives crits. Use Tera Type when the opponent's likely Tera changes either the attacking type's effectiveness or the defender's resistances. Use Dynamax only for formats where it is legal; the calculator will compute it, but that does not make it relevant to your ruleset.
The page also lists generations from Gen 1 through Gen 9, with language options and game-specific variants such as B2/W2 Hardmode, so mechanics like Dynamax, Tera and Z-moves should be read in the context of the generation you select. For move data and format rules, cross-check against Bulbapedia or Serebii; the calculator is best used for the arithmetic, not as the authority on what is legal.
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