Elo Calculator
Calculates the expected score of a player with an Elo rating Ra against a player with an Elo rating Rb.
Formula: 1/(1+10^(-(Ra-Rb)/400))
Ra: Rating of player a.
Rb: Rating of player b.
Example 1
For a player with a rating of 1600, what is their expected score against a player rated 1450?
| Value | Keystrokes | Display | Description |
|---|---|---|---|
| 1600 | Ra | 1,600.0000 | Stores the Ra value. |
| 1450 | Rb | 1,450.0000 | Stores the Rb value. |
| Ea | 0.7034 | Calculates Ea. |
Example 2
Calculate the rating of an opponent where the expected score of player a is 0.6.
These keystrokes assume the values from example 1.
| Value | Keystrokes | Display | Description |
|---|---|---|---|
| .6 | Ea | 0.6000 | Stores the Ea value. |
| Rb | 1,529.5635 | Calculates the Rb value. |
Reference: