Power up

In Pokémon GO, the player can power up (Japanese: 強化 strengthen) a Pokémon using Stardust and Candy to increase its stats. This is analogous to raising a Pokémon's level in the core series games, but in Pokémon GO, no numeric level is visible for Pokémon.

Mechanics

Each Pokémon has a level that effectively counts how many times it has been powered up. Each level corresponds to a CP multiplier, a value used to calculate the Pokémon's stats and catch rate. Each power-up increases the level by 0.5, up to the player's Trainer level + 10. The cost to power up a Pokémon increases every two levels (or every four power-ups). The highest level a Pokémon can be powered up to is 50.

A Pokémon that is currently Mega Evolved cannot be powered up.

Process

Players can power up eligible Pokémon by clicking the "Power Up" button on the Pokémon's summary screen. Upon pressing the Power Up button, a pop-up screen will show the following information:

The Pokémon's current CP, with an arrow pointing to the CP it would have after Powered Up.
The Stardust cost to power up
The Candy cost to power up
The Candy XL cost to power up, if applicable

The pop-up screen displays this information for one power-up by default. The screen also displays "-" and "+" buttons, allowing players to decrease or increase the number of power-ups to apply to the Pokémon. Once players have chosen how much to power up their Pokémon, they can click the "Power Up" button on the pop-up screen to apply the changes. Clicking the "Cancel" button on the pop-up screen will return players to the Pokémon's summary screen without making any changes.

Stat changes

Powering up a Pokémon raises its CP, which is derived from its HP, Attack, and Defense; as such, some combination of these stats will also increase. The CP and HP changes are reflected through animations shown on the Pokémon's summary screen. A Pokémon whose maximum HP increases by powering up will also gain an equal amount of remaining HP; consequently, if the Pokémon being powered up has fainted, it will be revived with a remaining HP equal to that amount.

Levels

Powering up a Pokémon requires both Stardust and Candy. The amount of Stardust and Candy required for the next power-up will be shown on the Pokémon's summary screen. If the Pokémon is at the maximum level for the player's Trainer level, then the player will not be able to power up the Pokémon. Each time a Pokémon is powered up, its stats are recalculated using a new CP multiplier.

If a Pokémon is transferred from Pokémon GO to GO Park in Pokémon: Let's Go, Pikachu! and Let's Go, Eevee! or to Pokémon HOME, its resulting level will be equal to its level from Pokémon GO, rounded down to the nearest whole number.

CP multiplier

The following table shows the CP multiplier that corresponds to each level, along with the costs needed to power up from that level. Cumulative costs show the total amount of Stardust and Candy needed to power up a Pokémon from Lv. 1. Pokémon that have reached Lv. 40 will require Candy XL instead of Candy to power up further.

Levels above 50 are unattainable by powering up, but have been coded into the game since the level cap was increased from 40 to 50. The CP multipliers for Lv. 50.5 and Lv. 51 are only attainable by a Lv. 49.5 and Lv. 50 Best Buddy, respectively, deployed as the player's current Buddy Pokémon. The CP multiplier for Lv. 55 is only attained by team leaders while Battle Training in Master League.

Lucky Pokémon require only 50% of the listed Stardust costs to power up. Shadow Pokémon cost 1.2× the listed Stardust and Candy to power up, while Purified Pokémon only require 90% of the listed Stardust and Candy costs (rounded up). Stardust reduction bonuses for Lucky and Purified Pokémon can stack, meaning that a Pokémon that is both Lucky and Purified only costs 45% of the normal Stardust amount to power up.

Level	CP multiplier	Cost to power up
Level	CP multiplier	Marginal		Cumulative
1	0.094	200	1	200	1
1.5	0.13513743	200	1	400	2
2	0.16639787	200	1	600	3
2.5	0.19265091	200	1	800	4
3	0.21573247	400	1	1200	5
3.5	0.23657266	400	1	1600	6
4	0.25572005	400	1	2000	7
4.5	0.27353038	400	1	2400	8
5	0.29024988	600	1	3000	9
5.5	0.30605738	600	1	3600	10
6	0.3210876	600	1	4200	11
6.5	0.33544503	600	1	4800	12
7	0.34921268	800	1	5600	13
7.5	0.36245776	800	1	6400	14
8	0.3752356	800	1	7200	15
8.5	0.38759242	800	1	8000	16
9	0.39956728	1000	1	9000	17
9.5	0.41119354	1000	1	10000	18
10	0.4225	1000	1	11000	19
10.5	0.43292641	1000	1	12000	20
11	0.44310755	1300	2	13300	22
11.5	0.45305996	1300	2	14600	24
12	0.4627984	1300	2	15900	26
12.5	0.47233608	1300	2	17200	28
13	0.48168495	1600	2	18800	30
13.5	0.49085581	1600	2	20400	32
14	0.49985844	1600	2	22000	34
14.5	0.50870176	1600	2	23600	36
15	0.51739395	1900	2	25500	38
15.5	0.5259425	1900	2	27400	40
16	0.5343543	1900	2	29300	42
16.5	0.54263575	1900	2	31200	44
17	0.5507927	2200	2	33400	46
17.5	0.55883059	2200	2	35600	48
18	0.5667545	2200	2	37800	50
18.5	0.57456913	2200	2	40000	52
19	0.5822789	2500	2	42500	54
19.5	0.5898879	2500	2	45000	56
20	0.5974	2500	2	47500	58
20.5	0.60482366	2500	2	50000	60
21	0.6121573	3000	3	53000	63
21.5	0.61940411	3000	3	56000	66
22	0.6265671	3000	3	59000	69
22.5	0.63364917	3000	3	62000	72
23	0.64065295	3500	3	65500	75
23.5	0.64758096	3500	3	69000	78
24	0.65443563	3500	3	72500	81
24.5	0.66121926	3500	3	76000	84
25	0.667934	4000	3	80000	87
25.5	0.67458189	4000	3	84000	90
26	0.6811649	4000	4	88000	94
26.5	0.68768489	4000	4	92000	98
27	0.69414365	4500	4	96500	102
27.5	0.70054289	4500	4	101000	106
28	0.7068842	4500	4	105500	110
28.5	0.7131691	4500	4	110000	114
29	0.7193991	5000	4	115000	118
29.5	0.72557562	5000	4	120000	122
30	0.7317	5000	4	125000	126
30.5	0.73474102	5000	4	130000	130
31	0.7377695	6000	6	136000	136
31.5	0.74078558	6000	6	142000	142
32	0.74378943	6000	6	148000	148
32.5	0.7467812	6000	6	154000	154
33	0.74976104	7000	8	161000	162
33.5	0.7527291	7000	8	168000	170
34	0.7556855	7000	8	175000	178
34.5	0.75863036	7000	8	182000	186
35	0.76156384	8000	10	190000	196
35.5	0.76448607	8000	10	198000	206
36	0.76739717	8000	10	206000	216
36.5	0.77029727	8000	10	214000	226
37	0.7731865	9000	12	223000	238
37.5	0.77606494	9000	12	232000	250
38	0.77893275	9000	12	241000	262
38.5	0.78179008	9000	12	250000	274
39	0.784637	10000	15	260000	289
39.5	0.78747359	10000	15	270000	304
40	0.7903	10000	10	280000	10
40.5	0.79280394	10000	10	290000	20
41	0.7953	11000	10	301000	30
41.5	0.79780392	11000	10	312000	40
42	0.8003	11000	12	323000	52
42.5	0.80280389	11000	12	334000	64
43	0.8053	12000	12	346000	76
43.5	0.80780387	12000	12	358000	88
44	0.8103	12000	15	370000	103
44.5	0.81280384	12000	15	382000	118
45	0.8153	13000	15	395000	133
45.5	0.81780382	13000	15	408000	148
46	0.8203	13000	17	421000	165
46.5	0.8228038	13000	17	434000	182
47	0.8253	14000	17	448000	199
47.5	0.82780378	14000	17	462000	216
48	0.8303	14000	20	476000	236
48.5	0.83280375	14000	20	490000	256
49	0.8353	15000	20	505000	276
49.5	0.83780373	15000	20	520000	296
50	0.8403	Maximum power up
50.5	0.84280371	Best Buddy only
51	0.8453	Best Buddy only
51.5	0.84780369	N/A
52	0.8503
52.5	0.85280366
53	0.8553
53.5	0.85780364
54	0.8603
54.5	0.86280362
55	0.8653	Master League Battle Training

Initial level

This section is incomplete.
Please feel free to edit this section to add missing information and complete it.
Reason: Confirm what happens if a player below Level 25 purifies a Level 25 or above Shadow Pokémon

Pokémon can only be obtained at whole-number levels. If a Pokémon with a fractional level is traded, its level is rounded down.

The following shows the possible range of initial levels for each encounter type.

Encounter	Level		Weather Boost
Encounter	Minimum	Maximum	Weather Boost
Wild spawn	$1$	$\min (T r a i n e r L e v e l, 30)$	✔
Hatched	$\min (T r a i n e r L e v e l, 20)$		✘
Field/Special/Timed Research and Research Breakthroughs	$15$		✘
Raid Battle	$20$		✔
After defeating Team GO Rocket	$8$ ^{[note 1]}		✔
Purified Pokémon	$\max (\min (T r a i n e r L e v e l, 25), O r i g i n a l L e v e l)$		✘
Trade	$\min (T r a i n e r L e v e l + 2, ⌊ O r i g i n a l L e v e l ⌋)$ ^{[note 2]}		✘

↑ Prior to November 7, 2019, Shadow Pokémon could be encountered at lower levels.
↑ A traded Pokémon will normally retain its original level, but its level cannot exceed its new Trainer's level + 2. If trading would reduce a Pokémon's level in this way, both players will be warned that its CP will be reduced as a result of this limit.

In other languages

Language		Title
Chinese	Cantonese	強化 Kèuhngfa
Chinese	Mandarin	強化 Qiánghuà
French		Recharger
German		Stärken
Italian		Potenziare
Korean		강화 Ganghwa
Brazilian Portuguese		Fortalecer
Spanish		Poder
Thai		พาวเวอร์อัป Power Up
Turkish		Güçlendir