I don't trust the in-built conversor, starting by the fact that it doesn't even say Quake Live, just Quake Champions and Quake/Source whatever the fuck that means.

Can I get some accurate formula to translate the values?

Also how do you even set mouse accel value in Diabotical? there's even a fucking graph in there, I have no idea. How do I add cl_mouseaccel 0.2 ?