My other suggestion that you might or might not like is going for a new calculation. Pick a game that you play with a low hipfire FoV (I think lowest I've seen is 80 HFoV), go as low as possible with sensitivity to still be able to atleast do a 180 turn. Then you have a sensitivity range calculation that is compatible with low fov games and try converting from there. If 0% will feel too fast go for 75% 100% or in between. I even used 200% when I played super low sensitivities. Good luck.