Pokemon IV Calculator
Calculate your Pokémon's actual stats at any level. Enter base stats, IVs, EVs, level and nature to get accurate stat values using the Gen 3+ formula — with worked examples and competitive build guides.
Pick the right nature for your build on our Pokemon natures chart, check type coverage with the type chart, or build a full team with the team builder.
What are IVs and EVs?
Individual Values: the hidden lottery
Individual Values, or IVs, are hidden numbers between 0 and 31 attached to each of a Pokémon's six stats. They are rolled the moment a Pokémon appears in the wild, hatches from an egg, or is received from an NPC, and they never change for the lifetime of that creature (Hyper Training can mask them, but the underlying IVs stay the same for breeding purposes). At level 100, each IV point translates to exactly one stat point, so a 31-IV Attack Pokémon hits 31 points harder than an identical 0-IV one. IVs are the reason two wild Pidgey caught on the same route can have noticeably different stats after a few levels of training.
Effort Values: training you control
Effort Values, or EVs, are the second hidden layer. Every Pokémon you defeat awards EVs of a specific type — defeating a Zubat grants 1 Speed EV, while a Machop grants 1 Attack EV. A single stat can accumulate up to 252 EVs, and a Pokémon can hold at most 510 EVs in total. Since the formula divides EVs by 4, 252 EVs yield 63 extra stat points at level 100 — which is why 252/252/4 is the classic competitive spread. Unlike IVs, EVs are fully under your control: vitamins, feathers, and power items all speed up training, and EV-reducing berries can reset mistakes. If you want to verify your current EVs in-game, most modern titles show an EV graph on the Pokémon's summary screen.
How the stat formula works
HP: floor((2 × Base + IV + floor(EV ÷ 4)) × Level ÷ 100) + Level + 10
Other stats: floor(floor((2 × Base + IV + floor(EV ÷ 4)) × Level ÷ 100) + 5) × Nature modifier
From Generation 3 onward, every mainline Pokémon game uses the same two-part stat formula. For HP, the game computes floor((2 × Base + IV + floor(EV ÷ 4)) × Level ÷ 100) + Level + 10. For the five other stats, it computes floor((floor((2 × Base + IV + floor(EV ÷ 4)) × Level ÷ 100) + 5) × NatureModifier), where the nature modifier is 1.1 for a boosted stat, 0.9 for a reduced stat, and 1.0 otherwise. Two details trip people up constantly. First, EVs are divided by 4 and floored before anything else happens — 255 EVs is a wasted spread because floor(255 ÷ 4) = 63, same as 252. Second, the nature multiplier is applied after the inner flooring, so a 10% boost never produces fractional stats.
Worked example: the famous 333 Speed Garchomp
Here is the formula applied to a real competitive staple: a level 100 Garchomp with 31 IVs, 252 Speed EVs, and a Jolly nature (+10% Speed). Its base Speed is 102. The inner term is 2 × 102 + 31 + floor(252 ÷ 4) = 204 + 31 + 63 = 298. Scaling by level: 298 × 100 ÷ 100 = 298. Adding the flat 5 gives 303. Finally, Jolly multiplies by 1.1: 303 × 1.1 = 333.3, floored to 333 — exactly the famous 333 Speed stat that lets Jolly Garchomp outrun base 100 scarfers by one point. You can verify every step by entering the same numbers into the calculator above and watching the stat update live.
When 0 IVs are better than 31
Competitive players deliberately hunt for 0 IVs in two stats, which surprises newcomers. A 0 Attack IV minimizes damage taken from Foul Play (which uses the target's own Attack) and from confusion self-hits, so special attackers and stally walls run it whenever possible. A 0 Speed IV, meanwhile, is the backbone of Trick Room teams: in Trick Room, the slowest Pokémon moves first, so a 0-IV, -Speed-nature build turns lumbering giants like Copperajah into lightning-fast sweepers for five turns. Minimum Speed also maximizes Gyro Ball damage, which scales inversely with the user's Speed. Use the calculator to compare a 31-IV build against a 0-IV one before committing to breeding.
When to use this calculator
Competitive team planning
Test whether a chosen EV spread outspeeds a specific threat or survives a calculated hit before spending hours breeding and training.
Nuzlocke and playthrough theory-crafting
Estimate how a newly caught Pokémon will perform ten levels from now, and decide whether it deserves a team slot over your current staple.
IV checking in-game
Plug in the stats you see on a summary screen, then adjust the IV sliders until the numbers match. The IVs that reproduce the in-game stats are your Pokémon's actual IVs.
Comparing natures and builds
Instantly see the difference between Adamant and Jolly on the same base stats, or between 252/252 and a bulk-oriented 252 HP / 4 Atk / 252 Spe spread.
5 common IV calculation mistakes
1. Forgetting the EV floor
EVs are divided by 4 and floored inside the formula. Running 255 EVs instead of 252 wastes 3 points that do absolutely nothing — always spread in multiples of 4.
2. Applying nature to HP
No nature raises or lowers HP. If your hand calculation shows HP changing with nature, you have mixed up the two formulas.
3. Using the wrong formula generation
Generations 1 and 2 used a completely different stat system (DVs from 0-15 and a doubling EV system). This calculator implements the Gen 3+ formula used from Ruby/Sapphire through Scarlet/Violet.
4. Assuming Hyper Training changes IVs
Hyper Training with Bottle Caps boosts a stat as if the IV were 31, but the stored IV stays the same. The effect disappears in level-50 formats' breeding math and does not pass down when breeding.
5. Ignoring level scaling
IV and EV contributions scale linearly with level. A 31-IV advantage is worth about 15 stat points at level 50 but only a few points at level 5 — relevant for Little Cup and low-level Nuzlocke planning.
Frequently asked questions
What are IVs in Pokémon?
Individual Values (IVs) are hidden stats ranging from 0 to 31 per stat. They are determined when a Pokémon is encountered and cannot be changed (except via Hyper Training in some games).
What are EVs in Pokémon?
Effort Values (EVs) are stat points earned by defeating specific Pokémon. Each stat can hold up to 252 EVs, with a total cap of 510 across all stats.
How do natures affect stats?
Each non-neutral nature increases one stat by 10% and decreases another by 10%. HP is never affected by nature. See our natures chart for the full list.
What is a good IV?
For competitive play, 31 (a 'perfect' IV) is the target in every stat you use. Attack is the exception for special attackers, where 0 is ideal, and Speed is reversed for Trick Room builds.
How do I check my Pokémon's IVs in-game?
In Scarlet/Violet, the Judge function unlocks after finishing the postgame and shows a rating per stat. Alternatively, enter your Pokémon's visible stats, level, nature and known EVs into this calculator and solve for the IVs.
Does Hyper Training change IVs?
No. Hyper Training sets a stat to behave as if its IV were 31, but the underlying IV value is unchanged — important if you plan to breed that Pokémon afterward.
Why does 252 EVs give 63 stat points and not 252?
The stat formula divides EVs by 4 and floors the result before adding it to the stat. That is also why running more than 252 EVs in one stat is always wasted.
Do IVs matter for casual play?
Less than competitive players fear. A 20-IV team clears any story mode comfortably. IVs mainly matter at level 50 competitive formats, Battle Tower-style streaks, and online ranked play.