Catch rate (GO)

Among the several mechanics that differ in Pokémon GO compared to the core series is the calculation of catch rate. Every is assigned a "base capture rate" that is applied to every member of that species, usually a value between 0% and 100%, which determines how difficult that species is to capture. The highest possible Power Up level a wild Pokémon can have is 30 under normal conditions, but if the Pokémon's type is boosted by weather, it can go up to level 35.

Calculation
Upon throwing a Poké Ball, the game will calculate, the probability of a successful capture.




 * is the base capture rate specific to a Pokémon's species
 * is the CP multiplier of a Pokémon, which is dependent on the Pokémon's Power Up level
 * is the product of several possible bonus multipliers, which may include:
 * Type of Poké Ball
 * Throwing technique
 * Berries used
 * Type-specific medals currently earned

Bonus multipliers
Bonus multipliers are a means for undefineds to better their odds of a successful capture, since the base capture rate and CP multiplier are outside of the players' control.

Only one Berry can be used at a time. A Berry's effect wears off after the wild Pokémon has broken out of a thrown Poké Ball.

A bonus multiplier is awarded for hitting the wild Pokémon within the colored target ring. The smaller the target ring becomes, the greater the bonus multiplier if hit. If the player hits outside the colored ring or the colored ring was too big when hit, then no bonus multiplier will be applied. A Curveball bonus is awarded for spinning the Poké Ball before throwing it, regardless of whether or not the ball hit inside the target ring.

Type medals, awarded based on how many Pokémon of a specific type was caught, apply a multiplier depending on the level of the medal. If a Pokémon is dual-typed, the multiplier will be the average of the type medal bonuses, including ×1.0 if no medal for one type.

When using a Pokémon GO Plus or Poké Ball Plus device to capture Pokémon, a regular Poké Ball will be used, and no bonus multipliers will be applied, except from type medals if applicable.

The highest possible multiplier that can be attained is ×22.1, which includes:
 * Using an Ultra Ball (×2.0)
 * Feeding a Golden Razz Berry (×2.5)
 * Throwing a Curveball (×1.7)
 * Making a perfect Excellent throw (×2.0)
 * Having a gold type medal bonus (×1.3)

Target ring colors
The color of the target ring allows players to gauge the probability of a successful capture, taking into account all bonus multipliers except from throws. Switching Poké Balls or feeding Berries may change the color of the ring. The more green the ring, the higher the catch rate; the more red it is, the lower the probability.

Critical capture
A critical capture is a rare phenomenon that was introduced to Pokémon GO alongside the release of Generation II Pokémon. Once in a while, a thrown Poké Ball will bypass catch rate checks and guarantee a capture. Instead of shaking three times, a throw Poké Ball will only shake once and the Pokémon will be confirmed caught. No additional bonuses are awarded for critical captures.

Examples
Consider a wild with 343 CP, with an estimated Power Up level of 14. Pikachu has a base capture rate of 20% and a CP multiplier of 0.49985844 at level 14. Without any bonus multipliers, the catch rate will be.
 * Poké Balls and Berries

The following table shows what this Pikachu's catch rate would be if bonuses for Poké Balls and Berries were applied, assuming no bonuses from throws or medals.

Consider a wild of 1252 CP, with an estimated Power Up level of 18. This means it will have a base capture rate of 30% and a CP multiplier of 0.56675452. Without any additional bonuses, the capture rate will be.
 * Throw technique

The following table shows how the capture rate will be affected by throwing techniques, assuming no additional bonuses and only regular Poké Balls are used; throw bonus multipliers will be averaged between the highest and lowest possible values.

Let's now consider a wild that has 670 CP, estimated to be Power Up level 20. Given that Abra has a base capture rate of 50% and its CP multiplier is 0.59740001, the catch rate without bonuses will be.
 * Medals

The following table shows the effect on catch rate via medals for each Poké Ball type, assuming no other bonus multipliers.