I've made a browser version of the spreadsheet variants of the ratings calculator. It's the first time that I make something in Html/Javascript, so I need(ed) to learn a lot of new things.
Download version 1.3 beta #2 for U31: https://github.com/Giseldah/Lotro-Ra...r/tree/1.3.0b2 (click Code: Download ZIP)
Extract the zip file somewhere and open index.html in your browser. It should work fine in Firefox, Chrome and Edge. I haven't checked it in other browsers.
The calculator is using CalcStat for all of the calculations. Ofc, no need to install it. An up-to-date JavaScript version 1.4p is located in the js-subdirectory.
Menu selections:
Click on the '?' button for some notes on how to use it.
Note: the calculator only converts pure rating values to percentages and vice versa. The percentages that you see in-game, in the character window, can contain bonus percentages (from trait trees for example) on top. These are usually round numbers like +5% for Critical Hit Chance, so it's not difficult to see and to add that number to the calculator's result.