For performance rating there might be online calculators, but also a table like this makes it easy to figure out.
For example if you score 67 percent then your performance is about 125 points higher than your opponent's rating.
If you score 25 percent then you're about 190 lower.
Naa, I just did it all manually, but yeah, excel would have been faster. Here's some tips to make it go quickly.
You can search for win, loss, and draw separately which makes it easy.
Each page has 50 games, so you only have to count the last page. For example if the last page has 35 games is page 7, then that means the total is 335 games.
If you adjust your screen size so that 10 games barely fit on your screen, you can count the last page very easily and quickly.