A summary screen in Pokémon GO. The semi-circle shows how close a Pokémon is to the Power Up limit, and the cost is displayed next to the Power Up button
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 no explicit numeric level is ever given for Pokémon in Pokémon GO.
Powering Up a Pokémon raises its stats, which is reflected on the Pokémon's summary screen in its HP and CP. Upon pressing the Power Up button, the game will show how much the CP will be increased and ask the player to confirm. If a fainted Pokémon is Powered Up, it will be revived with a remaining HP equivalent to how much it was increased by.
Each Pokémon effectively has a Power Up "level" that determines its CP multiplier, a value used to calculate the Pokémon's stats and catch rate. Each Power Up increases the Power Up level by 0.5, up to the player's Trainer level + 2. The cost to Power Up a Pokémon increases every two levels (or every four Power Ups). The half-circle gauge on a Pokémon's summary screen indicates how close it is to this limit. The highest possible Power Up level is 40. If a player is to be traded a Pokémon that exceeds their Power Up limit (Trainer level + 2), then both players will see a warning that the Pokémon's level will be reduced to the limit.
Pokémon can only be obtained at whole-number Power Up levels, including those from trades, in which the Power Up levels are rounded down. The following shows the possible range of initial Power Up levels for each encounter type.
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 Power Up 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, stats are recalculated using the CP multiplier, which increases with level. Lucky Pokémon require only 50% of the listed Stardust costs to Power Up.
The following table shows the CP multiplier that corresponds to each Power Up level, along with the costs needed to Power Up to the next level. Cumulative costs show the total amount of Stardust and Candy needed to Power Up a Pokémon from level 1. Cells that have been grayed-out denote values that cannot be attained or used, but are still coded into the game for conventional purposes.