How To Calculate What The CP Of A Pokémon Will Be After Evolution
Pokémon Go isn’t just about catching Pokémon. The game goes well beyond that simple concept and also has players enter battles with other trainers, fight for control of gyms, and even hatch eggs. When it comes to battles in Pokémon Go, the outcome will depend on how strong a Pokémon is. The strength of a Pokémon is determined by its CP i.e., Combat Power. When you first start catching Pokémon, you will encounter ones with very low CP but as your level increases, you will start to see stronger Pokémon around you.
If you can’t find a high CP Pokémon, you can evolve your current ones. Using a CP calculator before you evolve is a smart move. Evolving a Pokémon not only gives you a lot of XP, but it also increases the Pokémon’s CP. The only problem is that evolution demands high resources i.e. lots and lots of candy that is Pokémon specific, and the evolution might only result in a very minor increase in the CP. To prevent using resources on Pokémon that aren’t going to be worth it in the long run, use Pokémon Evolution Calculator to check how high a Pokémon’s CP will go if you evolve it.
CP Calculator vs Evolution Calculator: What’s the Difference?
Before diving in, it helps to know that not all CP calculators do the same thing. The tool covered in this article is an evolution estimator — it takes your Pokémon’s current CP and species, then predicts what its CP will be after evolving. It’s fast and useful for quick candy decisions, but it is not the same as a full CP calculator.
A true CP calculator goes further. It takes your Pokémon’s species, current level, and individual values (IVs) for Attack, Defense, and HP, and uses those inputs to calculate an exact or near-exact CP, HP, Attack, and Defense stat. That level of precision matters in several real situations:
- Great League planning: Great League caps eligible Pokémon at 1500 CP. A full CP calculator lets you figure out exactly what level to power up a Pokémon to without crossing that threshold and making it ineligible.
- Ultra League planning: Ultra League has a 2500 CP cap. Knowing the exact CP ceiling for your specific Pokémon’s IVs tells you whether it’s worth powering up at all, or whether it will hit the cap too early to be competitive.
- Power-up projections: If you’re investing stardust to push a raid attacker to level 40 or beyond, a full CP calculator shows you exactly how high that Pokémon can go so you can budget your resources accordingly.
If you need that kind of precision, tools like Pokémon GO’s in-game Appraise feature combined with a dedicated IV calculator will give you more reliable data. The evolution estimator below is the right tool for quickly deciding whether a Pokémon is worth evolving before you spend the candy.
How the CP Calculator Works
Pokémon Evolution Calculator relies on the current CP of the Pokémon you want to evolve, and which one it is, to estimate what its CP will be after evolving. The estimates aren’t 100% accurate but they come close enough for you to know if spending the resources i.e. candy, on a particular Pokémon is a good idea or not. The tool works by applying known multipliers for each species, giving you a reliable ballpark figure before you commit your candy.
To understand why the estimates aren’t always exact, it helps to know how CP is actually calculated in Pokémon GO. In plain English, a Pokémon’s CP is determined by four things working together: its base stats (Attack, Defense, and Stamina values unique to each species), its IVs (individual values that range from 0 to 15 for each stat), its level (which ranges from 1 to 50 for powered-up Pokémon), and a Combat Power Multiplier (CPM), a number that scales upward as the Pokémon’s level increases. The formula multiplies those inputs together and then scales the result down to produce the CP number you see on screen.
This particular evolution estimator only asks for current CP and species. It does not ask for exact level or IVs, because most casual players don’t have that data on hand. Instead, it applies the species’ known evolution multiplier to your current CP to get an estimate. That approach works well for a quick gut-check, but it cannot account for the fact that two Pokémon of the same species with the same CP can actually have very different IV and level combinations underneath.
Here’s a practical example: imagine two Eevee, both sitting at 600 CP. One might be a relatively low-level Eevee with near-perfect IVs, while the other is a higher-level Eevee with average IVs. Both show 600 CP, but after evolution into Vaporeon, they can end up at noticeably different CP values because their underlying stats differ. The estimator will give you the same prediction for both, which is why the actual result occasionally surprises you by a few points in either direction.
From the dropdown, select the Pokémon you’re looking to evolve, and enter its current CP. Click ‘Estimate CP’.
Here are the results according to the app for a 15 CP Weedle.
We tested this out, of course, and the estimated CP was fairly close. I still got 1000 XP but the bug only gained 1 CP. Even if it had gained the predicted 18 CP, it wasn’t going to be a huge improvement. This is the kind of evolution you do when you’re trying to level up quickly and not when you’re investing resources in a Pokémon that you want to use in a fight.
How to Find Your Pokémon’s Level and IVs
If you want to move beyond evolution estimates and use a full CP calculator for precise planning, you’ll need two pieces of information the estimator above doesn’t ask for: your Pokémon’s level and its IVs. Here’s how to get both directly from the game.
Finding IVs with the Appraise feature:
- Open the Pokémon’s summary screen and tap the menu (three lines at the bottom right), then select Appraise.
- Your team leader will evaluate the Pokémon and display three bar graphs representing its Attack, Defense, and HP IVs.
- Each bar can range from 0 to 15. A full bar represents an IV of 15 (perfect), a three-quarter bar is roughly 10–14, a half bar is roughly 5–9, and a low bar is 0–4.
- For exact IV numbers, take these bar readings into a dedicated IV calculator such as Pokémon GO’s own Appraise overlay or a third-party tool — the bars narrow down the possibilities significantly.
Estimating your Pokémon’s level:
- The white semicircular arc above your Pokémon on its summary screen shows its level relative to your trainer level. A marker near the far right of the arc means the Pokémon is close to your current level cap.
- You can also estimate level from power-up costs: lower stardust costs (200–400 stardust per power-up) indicate a low-level Pokémon, while higher costs (5,000–10,000+) indicate a Pokémon already at a high level.
- For a precise level, enter the Pokémon’s CP, HP, and appraised IVs into a full IV calculator — it will return a small set of possible level and IV combinations, which you can narrow down further.
Once you have your Pokémon’s level and IVs, you can plug them into a full CP calculator to get an exact stat projection rather than a rough estimate. This is especially important before spending large amounts of stardust on a PvP Pokémon or a high-level raid attacker.
Tips for Getting the Most Out of a CP Calculator
For Pokémon with higher CP, the estimates might vary by more than just 2-3 CP units. The difference can be as high as 50, and unlike in casual gym battles, that gap can genuinely matter depending on how you plan to use the Pokémon. In PvP league formats, even a small CP difference is significant: Great League caps eligibility at exactly 1500 CP, and Ultra League caps it at 2500 CP. A Pokémon that lands even one CP over the cap cannot enter that league at all, so relying on an estimate alone when building a league team is risky. For PvP Pokémon and expensive raid attackers where you’re committing thousands of stardust, use a full CP calculator with level and IV inputs to get a precise projection before you power up. The evolution estimator is the right choice for quick candy decisions — deciding whether a Pokémon is worth evolving at all — but exact level and IV tools are the better choice for long-term power-up planning.
Here are a few tips to make the most of the tool:
- Evolve in batches: Use a Lucky Egg before evolving multiple Pokémon to double the XP you earn from each evolution.
- Prioritize high-IV Pokémon: If you have access to an IV checker, focus your candy on Pokémon with strong individual values, since they’ll have a higher ceiling after evolution.
- Check before you commit: Always run the numbers through the CP calculator before spending rare candy on a Pokémon you’re unsure about.
- Understand the multiplier: Each species has a fixed evolution multiplier. For example, Magikarp evolving into Gyarados typically results in a dramatic CP increase, making it one of the most rewarding evolutions in the game.
Using the CP calculator strategically means you’ll never waste precious resources on an evolution that yields disappointing results. It’s a simple habit that can make a significant difference in how competitive your Pokémon roster becomes over time.
Visit Pokémon Evolution Calculator
