The converter uses 90 as default FOV and in the notes it says that you have to use the fov_cs_debug in the FOV field to get correct calculations. This is wrong however. You have to put 75 in the FOV field since that is the game's default FOV(and max FOV). My 360 rotation distance is 48cm, ingame sensitivity is 2.3 and DPI 450. I get these numbers from the calculator only when the FOV is set to 75. When it's 90, it says that my ingame sens is 1.9 which it isn't. The fov_cs_debug is 90 by default but you shouldn't use it in the converter.