Determine your true chance of catching wild Pokemon with our Pokemon catch rate calculator. Whether hunting legendaries or navigating a Nuzlocke run, get instant probability figures, shake breakdown odds, and expected Pokeball throw requirements.
Select the target species, current remaining HP percentage, ball choice, and active status effect to compute exact capture odds.
In mainline Pokemon games, catching wild Pokemon is governed by a mathematical algorithm. Understanding each component in this formula allows trainers to conserve Pokeballs and plan capture sequences safely.
Every Pokemon species has an intrinsic catch rate value between 3 and 255 hardcoded in game memory. Common species like Caterpie and Pidgey have a catch rate of 255. Legendary Pokemon like Mewtwo and Rayquaza possess a minimal base rate of 3, demanding preparation, specialty balls, and status effects.
The formula weighs remaining HP heavily: the factor (3 * MaxHP - 2 * CurrentHP) / (3 * MaxHP) yields a multiplier from 0.33 at full health to 1.0 at 1 HP. Lowering a target to the red zone roughly triples capture probability compared to full health.
Standard Poke Balls provide a baseline 1.0x multiplier. Great Balls offer 1.5x, while Ultra Balls step up to 2.0x. Specialty balls provide superior multipliers when specific battle conditions are met: Dusk Balls offer 3.0x in dark caves or at night, Net Balls deliver 3.5x on Water or Bug types, and Quick Balls provide a massive 5.0x multiplier on the initial turn.
Inflicting a persistent status ailment is one of the safest methods to elevate capture rates. Sleep (SLP) and Freeze (FRZ) provide the largest boost at 2.5x (and 2.0x in Gen 5). Paralysis (PAR), Burn (BRN), and Poison (PSN) grant a reliable 1.5x multiplier. In Nuzlocke challenge runs, Sleep and Paralysis are heavily favored because Burn and Poison risk damaging and inadvertently fainting the target.
Once the modified catch rate value 'a' is calculated, the game determines whether the Pokeball shakes zero, one, two, or three times before clicking shut. A shake probability value 'b' is calculated from 'a'. If four consecutive pseudo-random number checks fall below 'b', the capture succeeds. If any individual check fails, the ball breaks open on that exact shake.
Introduced in Gen 5, critical captures alter the sequence so the ball only needs to pass one shake check instead of four. The probability increases as you register more caught species in your Pokedex.
Choosing the right ball type drastically lowers the expected number of throws. Here is a reference table of ball multipliers and situational triggers.
| Pokeball Variety | Multiplier | Active Condition / Optimal Usage |
|---|---|---|
| Poke Ball | 1.0x | Standard baseline ball with no special conditions. |
| Great Ball | 1.5x | Reliable early to mid-game upgrade for general encounters. |
| Ultra Ball | 2.0x | Universal high-performance ball effective across all battle situations. |
| Dusk Ball | 3.0x | Active between 8:00 PM and 3:59 AM in-game or inside cave environments. |
| Net Ball | 3.5x | Active against any wild target possessing either Water or Bug typing. |
| Quick Ball | 5.0x | Active exclusively on the very first turn of wild combat. |
| Timer Ball | 1.0x - 4.0x | Increases by 0.3x per turn elapsed, reaching maximum 4.0x multiplier on turn 11+. |
| Repeat Ball | 3.5x | Active if the target species has already been registered in your Pokedex. |
| Dive Ball | 3.5x | Active when encountering wild Pokemon through surfing, fishing, or underwater. |
| Fast Ball | 4.0x | Active against species with a base Speed stat of 100 or higher. |
| Nest Ball | 1.0x - 3.0x | Higher multiplier against low-level targets; drops to 1.0x at level 30+. |
| Master Ball | Infinite (100%) | Bypasses all calculation checks for guaranteed capture success. |
In a Nuzlocke run, every route offers only one encounter. Accidental knockouts or failing to catch a fleeing target can hurt team balance. Apply these strategies to maximize capture efficiency.
False Swipe is an indispensable tool in any capture roster because it leaves the defender with exactly 1 HP without risk of fainting. Pairing False Swipe with a Pokemon that can inflict non-damaging Sleep or Paralysis guarantees the mathematical maximum capture probability achievable with standard combat methods.
Many wild species learn moves that inflict fatal self-damage, such as Take Down, Double-Edge, Explosion, Self-Destruct, or Memento. Before wearing down a target with damage, verify whether its current level pool contains recoil attacks. Against volatile targets, prioritize immediate Quick Balls, Spore sleep, or Ghost-type immunities.
Species like Abra or legendary roamers (such as Entei, Raikou, and Latios) will flee on their very first action. Utilize abilities like Arena Trap or Shadow Tag, moves such as Mean Look or Block, or open combat with a Quick Ball to secure your catch before they escape the encounter.
Open difficult encounters with a Quick Ball for an instant 5.0x boost. If the first throw fails, transition to safe status affliction like Thunder Wave or Hypnosis. Once combat extends past turn 10, Timer Balls provide a constant 4.0x modifier, outperforming standard Ultra Balls by a factor of two.
A catch rate is an internal numeric constant assigned to each Pokemon species, ranging from 3 to 255. When a player throws a Pokeball, the game plugs this constant into a mathematical formula alongside current HP, Pokeball multipliers, and status ailments to determine whether the target is caught.
Yes. The capture formula includes a health factor of (3 * MaxHP - 2 * CurrentHP) / (3 * MaxHP). At full health, this factor equals 0.33, while at 1 HP it reaches nearly 1.00, roughly tripling your capture probability.
Sleep and Freeze provide the highest multiplier at 2.5x in Generations 3, 4, 6, 7, 8, and 9 (and 2.0x in Gen 5). Paralysis, Burn, and Poison provide a 1.5x multiplier across all generations.
A capture requires passing four independent shake checks. Shaking three times indicates the Pokeball successfully passed checks 1, 2, and 3, but failed the final fourth check. Each shake corresponds to an individual pseudo-random calculation test.
A critical capture is a special capture event introduced in Generation 5 where the Pokeball emits a distinct high-pitched whistle in midair and only requires a single shake check to succeed. The chance of a critical capture increases as you catch and register more species in your Pokedex.
Quick Balls provide a 5.0x catch multiplier (4.0x in Gen 4), but only on the first turn of battle. Using a Quick Ball on turn 2 or later drops the multiplier to 1.0x, making it no more effective than a standard Poke Ball.