1. What is the ELO Rating System?

The ELO rating system is a method for calculating the relative skill levels of players in competitor-versus-competitor games like League of Legends. It was originally developed for chess but has been adapted for many competitive games.

2. How Does the Calculator Work?

The calculator uses the ELO formula:

Where:

• \( R_{new} \) — New ELO rating
• \( R_{old} \) — Current ELO rating
• \( K \) — K-factor (maximum possible adjustment per game)
• \( S \) — Actual score (1 for win, 0 for loss, 0.5 for draw)
• \( E \) — Expected score (probability of winning)

Explanation: The equation adjusts your rating based on whether you performed better or worse than expected against your opponent.

3. Importance of ELO in LoL

Details: In League of Legends, ELO (or MMR - Match Making Rating) determines your skill level and helps match you with similarly skilled players. Understanding how it changes can help you track your progress.

4. Using the Calculator

Tips: Enter your current ELO, K-factor (typically 32 for new players), actual score (1 for win, 0 for loss), and expected win probability (0-1).

5. Frequently Asked Questions (FAQ)

Q1: What is a typical K-factor in LoL?
A: Riot Games doesn't disclose exact values, but new players typically have higher K-factors (around 32) that decrease as they play more games.

Q2: How is expected score (E) calculated?
A: \( E = 1 / (1 + 10^{(opponent\_elo - your\_elo)/400}) \). This calculator assumes you already know E.

Q3: What's a good ELO in LoL?
A: It varies by season, but generally Gold+ is above average, Platinum+ is top 10%, and Diamond+ is top 2%.

Q4: Does LoL use exact ELO for matchmaking?
A: LoL uses a modified system called MMR (Match Making Rating) which is similar to ELO but with additional factors.

Q5: How often does ELO update in LoL?
A: Your visible rank (LP) updates after each game, but your hidden MMR updates continuously.