No, I cannot keep the same DPI because the new mouse doesn't come with software to do that
When I leave the calculator with a blank sens it defaults to 50. It has 50 in a grey text which it defaults to.
The lowest I can put my sens to is 1 not 0 but even then it really really slow. Like I have to move my mouse across my 3ft mouse pad to turn almost 90 degrees.
I tried your conversion equation and it put my new sens to 78. It felt a little to fast so I lowed it to 75 and it feels close to the same.
From here is a good starting point. I can always adjust if needed. Thanks for the help.