How MMR Shapes Your League of Legends Experience

League of Legends, also known as LoL, is a team-based multiplayer online battle arena game that attracts players from different parts of the world. It has a ranking system that is unknown to some players, but it’s essential in the League of Legends community called the MMR. In this post, we will be decoding MMR in League of Legends, how it works and help demystify this ranking system

First and foremost, MMR stands for Matchmaking Rating, and it’s a value assigned to each player in the game. The MMR determines the player’s skill level, and it is calculated based on the player’s wins and losses during a ranked season. The system matches players with similar MMR values in a team on the same ranking tier. The MMR allows you to compete against others at your skill level in ranked matches, thus providing the most competitive gaming experience possible.

Second, League of Legends has different ranking tiers starting from Iron Tier to Challenger Tier. Each tier is divided into four divisions: Division IV, III, II, and I. Your rank increases when you win games, and it decreases when you lose games. However, if you reach 100 points in a division, you play promotion matches for a chance to advance to the next rank. The MMR plays a vital role in determining whether you get promoted or demoted.

Third, MMR is not based on KDA (Kills, Deaths, and Assists) not even on the types of champions you play or how many mastery points you have on them. Instead, it’s based on the overall team’s performance during the game. The MMR is calculated using a sophisticated algorithm that is kept private by Riot Games – the developers of League of Legends. However, we can assume that the following factors are important when calculating your MMR: the number of games played, your win/loss ratio, and your opponents’ MMR. 

Fourth, as you climb higher in the ranking system, the MMR gains or losses for a win or loss decrease. That’s because you might have won many games in a lower division, but that doesn’t necessarily mean that you’re good enough to climb higher. Hence, League of Legends limits the MMR you can gain in a single game to avoid soaring up the ranks without genuinely improving your skill.

Lastly, League of Legends has a feature that was implemented called the Ranked Decay. It means that you need to play one game at least every 28 days to be able not to lose LP (League Points) in your division. The decay rate is per day, and it doesn’t expire until you play the required number of games to remove the decay. It’s essential to keep an eye on your LP and make sure you don’t lose them regularly due to inactivity.


In conclusion, MMR is a vital aspect of League of Legends, and it helps players become more competitive in ranked games. It’s essential to keep improving to rank up in the rankings since the MMR gains and losses decrease as you ascend higher. This encourages players to play more games while keeping its matchmaking system fair. The system seems complex at first glance, but as you play more games and climb higher in the rankings, you’ll learn how it works, and you’ll be able to compete at your best skill level. We hope this post has helped decode MMR in League of Legends and provide a better understanding of how it works.


Ivy Skye Marshall: Ivy, a social justice reporter, covers human rights issues, social movements, and stories of community resilience.