Discover the intricacies of your chess prowess with the FIDE Chess Rating Calculator. This tool demystifies how every checkmate and strategic move translates into your global ranking. Engage with a system used by novices and grandmasters alike to quantify skill, progress, and competitive standing in the world of chess.

Understanding the Basics

Rating (R): The rating is a numerical value given to a player, indicating their skill level. Higher numbers indicate stronger players.

Opponent’s Rating (Rc): This is the rating of the player’s opponent in a match.

Score (W): The result of your game or tournament. Wins, losses, and draws are calculated as 1, 0, and 0.5 points, respectively.

K Factor – The Development Coefficient

The K factor is a crucial element in calculating rating changes. It determines the maximum amount of points a player can gain or lose in a game. The K factor varies based on the player’s experience and rating:

  • K = 40: For new players until they’ve completed at least 30 games.
  • K = 20: For players with a rating under 2400.
  • K = 10: For players whose rating has reached or surpassed 2400.
  • K = 40: For all players under 18, as long as their rating is below 2300.
  • K = 20: For all Rapid and Blitz ratings, regardless of age or rating.

Calculating Your Rating Change

  1. Determine Your K Factor: Use the guidelines above to find out which K factor applies to you.
  2. Calculate the Expected Score (E): The expected score is the predicted outcome based on your rating compared to your opponent’s. It’s calculated using a specific formula: E=1/(1+10(Rc−R)/400)E=1/(1+10(Rc−R)/400).
  3. Find the Rating Change (∆R): The change in your rating after a game or tournament is determined using the formula: ΔR=K×(W−E)ΔR=K×(W−E).
    • W: Your actual score from the game or tournament.
    • E: Your expected score.
    • K: Your K factor.

Example Calculation

Suppose a player with a 2000 rating (under 18 years old) plays against a 2100 rated opponent and wins:

  1. K Factor: Since the player is under 18 and rated under 2300, K = 40.
  2. Expected Score (E): Calculate E=1/(1+10(2100−2000)/400)≈0.36E=1/(1+10(2100−2000)/400)≈0.36.
  3. Actual Score (W): The player won, so W = 1.
  4. Rating Change (∆R): Now, calculate ΔR=40×(1−0.36)=25.6ΔR=40×(1−0.36)=25.6.

The player’s new rating would be approximately 2025.6 after this win.

FIDE Rating Calculator

Enter your details below to calculate your potential rating change after a game.

Tips for Using the Calculator

  • Record Keeping: Keep track of your games, opponents’ ratings, and your results for accurate calculations.
  • Continuous Learning: Understand that the rating is a reflection of your current skill level. Improvements in your game will naturally reflect in your rating over time.
  • Regular Updates: Ratings are typically updated monthly by FIDE based on tournament results. Keep an eye on official updates for the most accurate information.

Using a FIDE Chess Rating Calculator can be a straightforward process if you understand the basic components and have the necessary information about your games. Keep playing, and watch your rating evolve as you improve!


How do I calculate my FIDE rating?

To calculate your FIDE rating, you need to play in FIDE-sanctioned tournaments against rated opponents. Your initial rating is calculated based on your performance in these games, specifically your scores against rated players and their respective ratings. After each game or tournament, your rating will change based on the formula involving your score, your opponents’ ratings, and your K factor. The basic formula is ΔR=K×(W−E)ΔR=K×(W−E), where ΔRΔR is the rating change, KK is the development coefficient, WW is the actual score, and EE is the expected score.

How do I find my FIDE chess rating?

To find your FIDE chess rating, you can visit the official FIDE website and use their rating lookup tool. Simply enter your name or FIDE ID, and it will display your current rating along with other details like your rank and previous game history. Keep in mind that if you’ve never participated in official FIDE-rated events, you may not have a FIDE rating.

How do I convert my rating to FIDE?

There is no official formula for converting a rating to a FIDE rating or vice versa as they are based on different pools of players and systems. However, many players observe that online ratings, like those on, tend to be inflated compared to FIDE ratings. You might find anecdotal conversion charts or calculators online created by other players, but these should be taken with caution as they’re not official or consistently accurate. The best way to know your FIDE rating is by participating in FIDE-rated tournaments.

Is 1500 a good chess rating?

Whether a 1500 rating is good depends on the context and what rating system you’re referring to. In general:

  • FIDE and National Federations: A 1500 rating is generally considered about average among adult tournament players. It indicates a solid understanding of the game, but there’s still a significant journey to the expert and master levels.
  • Online Chess Platforms: Ratings can be inflated compared to official ratings. A 1500 might be slightly lower on the skill level compared to the same number in FIDE rating.

In all cases, “good” is subjective and relative to the pool of players you are comparing yourself to. For casual players, 1500 can represent a significant milestone, while for competitive players, it might be seen as a starting point for more serious development.

Link | Free FIDE Chess Rating Calculator

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