user15248: wI understand "Tournament Performance Rating", but I have seen a Web calculator that also has TPG. What is the difference between them and why are both used?

user9684: https://www.englishchess.org.uk/Juniors/tournament-performance-calculator/
"The tournament performance grade (TPG) commonly used in the ECF grading system is calculated on a different basis than a TPR.  Junior selection TPGs, however, are essentially TPR calculations using FIDE ratings that correspond to ECF grades."

15248: <p>wI understand &quot;Tournament Performance Rating&quot;, but I have seen a <a href="https://www.englishchess.org.uk/wp-content/uploads/2012/01/CalculatorPage.html" rel="nofollow noreferrer">Web calculator</a> that also has TPG. What is the difference between them and why are both used?</p>
 9684: <p><a href="https://www.englishchess.org.uk/Juniors/tournament-performance-calculator/" rel="nofollow noreferrer">https://www.englishchess.org.uk/Juniors/tournament-performance-calculator/</a></p>
<p>&quot;The tournament performance grade (TPG) commonly used in the ECF grading system is calculated on a different basis than a TPR.  Junior selection TPGs, however, are essentially TPR calculations using FIDE ratings that correspond to ECF grades.&quot;</p>
