EloCalculator
Elo Calculator - strictly implemented FIDE Rating Regulations
This little tool might be helpful for chess players.
The FIDE Rating Regulations (effective from 1 March 2024) are strictly implemented, therefore its calculation is hundred percent accurate.
There is a Windows only version (Windows 7 or higher, .NetFramework 4.7.2 or higher (you don't need to worry about this with a current Windows 10 or 11)) ... and a Java version (Java 17 or higher).