In Raids, and hatching eggs, a Pokémon's CP is tied to its IVs.
For example, I have caught 2 Darkrai in recent raids. Both had a CP of 2124, and both had IVs of 14/14/15 (Atk/Def/HP).
Additionally, I have hatched 2 Magikarp from eggs. Again both had a CP of 155, and both had IVs of 15/15/13 (Atk/Def/HP).
I know that there is a link between CPs and predetermined IVs in these situations (as there are raid IV calaculators, though I haven't found any to determine Egg IVs), but is there any link between CP and IVs for Pokémon caught in the wild?
Best Answer
A Pokemon you encounter in the wild has the same CP after you catch it. The CP is calculated from a per-species formula that depends on the IVs and the level. Since you can't see the level in the wild, you can't calculate the IVs precisely, but you can approximate.
The app Calcy IV, for example, can calculate the stats of Pokemon you encounter in the wild using information including the CP and the color of the circle.