---
title: "Chess Performance Rating Calculator (FIDE) | Chess Meadow"
description: "Your chess performance rating the FIDE way: average opponent rating plus dp from FIDE's table, with the score percentage and expected scores."
url: https://chessmeadow.me/performance-rating-calculator/
---

Rp = Ra + dp · FIDE Handbook B.01 and B.02

# Chess performance rating calculator

Your performance rating is the average rating of your opponents plus a rating difference read from FIDE’s table for your score. Enter each opponent’s rating and your result.

## How FIDE calculates a performance rating

FIDE’s performance rating is Rp = Ra + dp. Ra is the average rating of your opponents, rounded to the nearest whole number with 0.5 rounded up. Your fractional score p is your points divided by the number of games, and table 8.1.1 converts it into the rating difference dp: 5 points from 9 games is 55.6%, read as .56, which gives +43. With the example above, an average of 2322 plus 43 makes 2365.

- **Rounding p:** the table lists dp for whole hundredths, so this calculator rounds p to the nearest hundredth, half up, before reading it.
- **0% and 100%:** FIDE’s table gives dp only notionally as −800 or +800 for these scores, so treat a perfect or zero performance as a rough figure.
- **The “algorithm of 400”:** the quick estimate (sum of ratings + 400 × (wins − losses)) ÷ games is shown for comparison and labelled as an estimate. It is not FIDE’s method.
- **Norms:** title norms add rules about opponents’ titles, federations and a rating floor, set out in the FIDE Title Regulations.

The second tool reads table 8.1.2: the expected score for each player for any rating difference, the figure the rating calculator uses for every game.

| p | dp | p | dp | p | dp | p | dp | p | dp | p | dp |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | +800 | .83 | +273 | .66 | +117 | .49 | −7 | .32 | −133 | .15 | −296 |
| .99 | +677 | .82 | +262 | .65 | +110 | .48 | −14 | .31 | −141 | .14 | −309 |
| .98 | +589 | .81 | +251 | .64 | +102 | .47 | −21 | .30 | −149 | .13 | −322 |
| .97 | +538 | .80 | +240 | .63 | +95 | .46 | −29 | .29 | −158 | .12 | −336 |
| .96 | +501 | .79 | +230 | .62 | +87 | .45 | −36 | .28 | −166 | .11 | −351 |
| .95 | +470 | .78 | +220 | .61 | +80 | .44 | −43 | .27 | −175 | .10 | −366 |
| .94 | +444 | .77 | +211 | .60 | +72 | .43 | −50 | .26 | −184 | .09 | −383 |
| .93 | +422 | .76 | +202 | .59 | +65 | .42 | −57 | .25 | −193 | .08 | −401 |
| .92 | +401 | .75 | +193 | .58 | +57 | .41 | −65 | .24 | −202 | .07 | −422 |
| .91 | +383 | .74 | +184 | .57 | +50 | .40 | −72 | .23 | −211 | .06 | −444 |
| .90 | +366 | .73 | +175 | .56 | +43 | .39 | −80 | .22 | −220 | .05 | −470 |
| .89 | +351 | .72 | +166 | .55 | +36 | .38 | −87 | .21 | −230 | .04 | −501 |
| .88 | +336 | .71 | +158 | .54 | +29 | .37 | −95 | .20 | −240 | .03 | −538 |
| .87 | +322 | .70 | +149 | .53 | +21 | .36 | −102 | .19 | −251 | .02 | −589 |
| .86 | +309 | .69 | +141 | .52 | +14 | .35 | −110 | .18 | −262 | .01 | −677 |
| .85 | +296 | .68 | +133 | .51 | +7 | .34 | −117 | .17 | −273 | .00 | −800 |
| .84 | +284 | .67 | +125 | .50 | 0 | .33 | −125 | .16 | −284 |  |  |

| D | H | L | D | H | L | D | H | L | D | H | L |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 0–3 | .50 | .50 | 92–98 | .63 | .37 | 198–206 | .76 | .24 | 345–357 | .89 | .11 |
| 4–10 | .51 | .49 | 99–106 | .64 | .36 | 207–215 | .77 | .23 | 358–374 | .90 | .10 |
| 11–17 | .52 | .48 | 107–113 | .65 | .35 | 216–225 | .78 | .22 | 375–391 | .91 | .09 |
| 18–25 | .53 | .47 | 114–121 | .66 | .34 | 226–235 | .79 | .21 | 392–411 | .92 | .08 |
| 26–32 | .54 | .46 | 122–129 | .67 | .33 | 236–245 | .80 | .20 | 412–432 | .93 | .07 |
| 33–39 | .55 | .45 | 130–137 | .68 | .32 | 246–256 | .81 | .19 | 433–456 | .94 | .06 |
| 40–46 | .56 | .44 | 138–145 | .69 | .31 | 257–267 | .82 | .18 | 457–484 | .95 | .05 |
| 47–53 | .57 | .43 | 146–153 | .70 | .30 | 268–278 | .83 | .17 | 485–517 | .96 | .04 |
| 54–61 | .58 | .42 | 154–162 | .71 | .29 | 279–290 | .84 | .16 | 518–559 | .97 | .03 |
| 62–68 | .59 | .41 | 163–170 | .72 | .28 | 291–302 | .85 | .15 | 560–619 | .98 | .02 |
| 69–76 | .60 | .40 | 171–179 | .73 | .27 | 303–315 | .86 | .14 | 620–735 | .99 | .01 |
| 77–83 | .61 | .39 | 180–188 | .74 | .26 | 316–328 | .87 | .13 | > 735 | 1.0 | .00 |
| 84–91 | .62 | .38 | 189–197 | .75 | .25 | 329–344 | .88 | .12 |  |  |  |

## Sources

- Rp = Ra + dp, averaging and rounding: [FIDE Title Regulations, applied from 1 January 2024](https://handbook.fide.com/chapter/B012024) (FIDE Handbook B.01), 1.4.7 to 1.4.9; the same definition is the Tournament Performance Rating in the [FIDE Play-Off and Tie-Break Regulations](https://handbook.fide.com/chapter/TieBreakRegulations032026) (C.07), 10.2.
- Tables 8.1.1 and 8.1.2, and dp at 0 and 100%: [FIDE Rating Regulations, applied from 1 March 2024](https://handbook.fide.com/chapter/B022024) (FIDE Handbook B.02), 8.1.

## Questions

**How do I calculate my chess performance rating?**

Average your opponents’ ratings, work out your score as a fraction of the games, and add the rating difference FIDE’s table gives for that fraction. 50% adds nothing; 75% adds 193.

**What performance do I need for a GM norm?**

At least 2600 (2599.5 before rounding) against opponents averaging at least 2380, with at least 35%, plus the other norm rules in the FIDE Title Regulations.

**What is my expected score against a stronger player?**

Read it from table 8.1.2: 100 points below an opponent you are expected to score .36 a game, 200 points below .24, and 400 points below .08.