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True performance ratings in Vega cross tables

Vega will calculate FIDE-style performance ratings, which are useful for working out IM or GM norms. For other purposes, the true performance rating – the rating at which a player's expected score equals their actual score – is what's wanted. Copy-paste a Vega cross table from a Swiss or round-robin tournament into the text area below, and click 'Calculate' to add a column with the performance rating to the cross table.

The "R" in "Rtg" or the "E" in "Elo" must align with the thousands digit of the ratings.


Posted 2020-09-25,
updated 2020-10-02 (round-robins).


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