Please don't post misleading and directly false posts like this. The calculator gives you all the tools to do exactly what this reddit post is saying.
There is nothing wrong with the Valorant conversion, and we know exactly how the conversion work... trust me.
3.181818 is the (approximate) factor used to convert 360 distance. This is correct for ANY conversion where you want the same 360 distance, which a lot of people prefer:
https://www.mouse-sensitivity.com/?share=f7794e5715aefe21d34c182cb06c2668
3.3735 is the approximate factor for matching MDV 0% in 16:9:
https://www.mouse-sensitivity.com/?share=ac1b63367434d146cc8a30bd00c13640
This however NOT correct for other aspect ratios, for 21:9 it is closer to 4.533
https://www.mouse-sensitivity.com/?share=eacf0e7e41f752eecb00bff8975e1254
And for 4:3 it's about 2.53:
https://www.mouse-sensitivity.com/?share=1ea35feb01e719606da9bbd6c05933e6