# How do you calculate your Tournament Performance Rating?

How do you calculate your Tournament Performance Rating?

1. Do you know the formula for calculating your TPR (FIDE or USCF)?

2. Can you link me to a FIDE TPR calculator and then a USCF TPR calculator?

• I recall that rating change calculators have this TPR function.

TPR calculators and expected rating change.

Basically Performance rating is the average of your opponent's ratings with an adjustment based on the score of the game. For each win, you add your opponent's rating + 400, a draw is just your opponent's rating, and a loss is your opponent's rating - 400. There is an exception for a perfect score, then the adjustment is 800.

• The links are nice, but the explanation you provide doesn't match with the results from the calculators. In the USCF, a perfect score gives an adjustment of 400, not 800. And rating plus or minus 400 for non-perfect scores might be a crude estimate, but it is by no means the formula they actually use, for either USCF or FIDE. – D M Jul 31 '17 at 17:14
• Watching FIDE tournaments gives the adjustment. I watched neither a USCF nor an England tournament, so I can't verify those. I do know that USCF uses a percentage likely to win to find their adjustment. – Fred Knight Jul 31 '17 at 17:38

Section 1.48 of the FIDE Title Regulations effective from 1 July 2017 specifies how the performance rating is calculated. The average rating of the opponents is adjusted by a value determined by looking up the percentage score in a table.

For example, after Round 12 of the 2018 Candidates Tournament, Ding Liren had 6.5 out of 12 points, for a rounded percentage score of 54%. According to the table, this corresponds to an adjustment of +29. The rounded average rating of his opponents was

(2763 + 2 * 2794 + 2 * 2809 + 2 * 2767 + 2 * 2784 + 2 * 2799 + 2800) / 12 ~= 2789,

so his performance rating at this point was 2789 + 29 = 2818, as you can see in this screenshot: 