Experience (summoner)

Summoner Experience is the reward, together with Influence Points, awarded to a summoner after completing a game. It ceases to be received after the Summoner's level is maxed out at 30. The received Experience Points are calculated at the end of each game; wins are worth more than losses, and the longer the game lasts, the more XP you gain.

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Increasing experience gain

 * Summoner Experience gain can be increased by purchasing an XP Boost from the PVP.Net store. This will double the experience earned at the end of each match.

XP gains

 * There is both a minimum and a maximum amount of XP and IP a player can get from a game.
 * A 3v3 game that is won at or before 20 minutes awards 95 XP and 64 IP.
 * Current (July 2011) formula for XP winning a Normal game at level 15-19 is roughly 3m+25, where m is the number of minutes the game lasts, capped at 198. Intermediate Bot games at level 10-14 use the same formula. At level 15-19, Intermediate Bot games subtract a 25% penalty from that formula, and give XP for only the first 180 minutes a day of play.
 * A XP Boost is also available from purchasing it with Riot points at the store.

Leveling up
The following describes the amount of experience required to go from one level to the next:

Assuming an average XP gain to be about 110 XP per game, one can reach summoner level 30 within 365 normal games. XP boosts will decrease the required game count while custom games and beginner Co-op vs. AI games played past level 9 will increase it. There is also a daily cap on how much you can gain in custom games.