Pokémon GO CP Explained: How Combat Power Works and Why It Matters

You’ve caught a Pokémon and the number at the top is 2,847. Your friend caught the same species and theirs says 1,204. Who has the stronger Pokémon?

Usually the higher CP one — but not always. CP is Pokémon GO’s headline stat, the single number that summarises a Pokémon’s power level at a glance. Understanding what it actually represents (and where it falls short as a measure of quality) makes you a more effective trainer across raids, PvP, and resource allocation.

This guide covers how CP is calculated, the relationship between CP and IVs, why CP matters in raids but works differently in GO Battle League, and how to decide when a high CP Pokémon is worth powering up. The complete Pokémon GO guide covers the broader system if you want the full picture.

What Is CP?

CP stands for Combat Power. It’s a single number that combines a Pokémon’s Attack stat, Defense stat, and Stamina (HP) stat along with the Pokémon’s current level into one figure. Niantic designed it as an at-a-glance power indicator so players don’t need to read raw stat tables during gameplay.^[1]

A higher CP generally means a more powerful Pokémon. But CP can be misleading when comparing Pokémon of different species — a 500 CP Dragonite is a very different proposition from a 500 CP Magikarp, because their base stats are completely different.

How CP Is Calculated

The CP formula in Pokémon GO is:^[2]

CP = (Base Attack + IV Attack) × √(Base Defense + IV Defense) × √(Base Stamina + IV Stamina) × CP Multiplier² ÷ 10

Breaking that down into plain language:

• Base stats — fixed values determined by the Pokémon species. A Dragonite has higher base Attack than a Pidgey regardless of IVs or level.
• IVs (Individual Values) — bonus values from 0 to 15 added on top of base stats. These are determined at catch and represent the individual Pokémon’s potential. IV Attack, IV Defense, and IV Stamina each range from 0 to 15.
• CP Multiplier — a value that increases as you power up a Pokémon. At level 1 it’s 0.094, at level 40 it’s 0.7903, and at the max level 50 it’s 0.8403. This is the primary driver of CP growth when you power up.

The formula has one important consequence: Attack matters more for CP than Defense or Stamina, because it appears linearly (not under a square root). A high Attack IV inflates CP more than the same IV in Defense or Stamina. This creates the phenomenon where high-CP Pokémon sometimes have suboptimal IVs for PvP — we’ll come back to this.

CP Multiplier by Level

The CP Multiplier is what changes when you power up. Each power-up increases it, raising CP as a result.^[2]

Notice that the multiplier increases quickly from level 1 to 30, then slows significantly. Powering from level 30 to 50 adds only about 15% more CP despite costing enormous amounts of stardust and XL candy. The bulk of CP gain happens in the earlier levels.

Max CP by Species

Each Pokémon species has a maximum possible CP, determined by its base stats and achievable at level 50 with perfect IVs (15/15/15). Max CP varies enormously by species:^[3]

This is why CP comparisons only make sense within the same species. A 1,500 CP Azumarill is near its maximum potential; a 1,500 CP Dragonite still has enormous room to grow.

CP vs IVs — What’s the Difference?

IVs and CP are related but not the same thing. IVs are the raw genetic potential of an individual Pokémon; CP is a compressed summary of its current power level that includes IVs, base stats, and level all at once.

The key distinction: a lower-CP Pokémon can be more valuable than a higher-CP one, depending on what you’re trying to do.

For raids and gym battles, maximum CP generally correlates with maximum DPS. A 100% IV (15/15/15) Rayquaza at level 50 is the strongest Rayquaza you can field. Here, high CP = high performance.

For GO Battle League PvP, it’s more complicated. Each league has a CP cap (Great League: 1,500 CP, Ultra League: 2,500 CP, Master League: no cap). Pokémon in Great and Ultra League need to be powered up to exactly hit the league ceiling — overshooting wastes stats. And for some Pokémon, lower Attack IVs are actually better for PvP.

Here’s why: because Attack contributes more to CP than Defense or Stamina, a Pokémon with high Attack IVs hits the CP cap at a lower level — which means it has less Defense and Stamina than a version with lower Attack IVs that can reach a higher level before hitting the cap. A 0/15/15 Umbreon for Great League is technically more powerful in PvP than a 15/15/15 one, even though it has a lower maximum CP. This is counterintuitive, but it’s how the math works.

When CP Matters (and When It Doesn’t)

How to Check and Improve CP

Appraising your Pokémon: Tap the menu button on any Pokémon’s profile and select Appraise. Your team leader gives a summary of the Pokémon’s IV ranges. The star rating (1–4 stars) indicates overall IV quality:^[1]

• 1 star — total IVs 0–22 (poor)
• 2 stars — total IVs 23–29 (below average)
• 3 stars — total IVs 30–36 (good)
• 4 stars (red sparkle) — total IVs 37–45, with at least one stat being 15 (excellent)
• 3 bars shining — 45/45 = perfect IVs (15/15/15)

Powering up: Use the Power Up button on a Pokémon’s profile. Each power-up costs Stardust and Candy, increases the Pokémon’s level by 0.5, and raises CP based on the new CP Multiplier. You can power up any Pokémon to level 40 with regular candy, and to level 50 with XL Candy.

Shadow and Purified Pokémon: Shadow Pokémon have 1.2× Attack and 0.833× Defense multipliers applied to their stats — this makes them deal more damage at the cost of being frailer. Their CP looks lower than a fully powered regular version, but their raid DPS often exceeds it. Purifying a Shadow adds a flat +2 to each IV, which can be useful for bringing a near-perfect Shadow to perfect IVs.

The Appraisal Shortcut

You don’t need to manually check IV percentages. The appraisal screen gives you a visual arc that fills based on each stat’s IV. Three full bars means 15/15/15 (100% IVs). Two full bars on Attack with a third bar partially filled is a reasonable mid-tier Pokémon.

For raid attackers, aim for 3-star Pokémon or better before investing stardust. For PvP Pokémon, check a PvP IV calculator (PvPoke.com is the standard resource) to find which specific IV combination performs best at your target CP cap — because as mentioned above, 100% IVs are often not the optimal PvP IVs.

Conclusion

CP is the most visible stat in Pokémon GO, but it’s a simplified summary that compresses three underlying stats and a level multiplier into one number. It’s a useful guide — higher CP almost always means a stronger raider — but it breaks down in PvP, where the CP cap system rewards specific IV distributions over raw maximums.

The practical takeaway: chase high CP for raid attackers, use IV-optimised Pokémon for Battle League, and understand that a 3-star Pokémon at max level will outperform a 1-star Pokémon at the same level every single time. The gap between 90% IVs and 100% IVs is small; the gap between level 25 and level 40 is not. Power up first, chase perfect IVs when you have the resources.

The hidden IV stats behind every Pokemon also play a major role in determining CP. Our Pokemon GO IVs Explained guide covers how they interact.

References

1. Niantic. “How do CP and Hit Points work?” Pokémon GO Help Center.
2. GamePress. “CP Multiplier.” GamePress Pokémon GO.
3. Pokémon GO Hub Database. “Max CP List.” Pokémon GO Hub.

Michael R.

I've been playing video games for over 20 years, spanning everything from early PC titles to modern open-world games. I started Switchblade Gaming to publish the kind of accurate, well-researched guides I always wanted to find — built on primary sources, tested in-game, and kept up to date after patches. I currently focus on Minecraft and Pokémon GO.