Discrepancy

[TwistyDoesntMiss]

For Battlefield 1, Im using the tool to find out my 360 rotation to inches. When i enter all of my info, solder sens which is 13%, 1080 resolution, 74 FOV, 400 DPI, it tells me that my 360 rotation is 16.0286 inches. however when im in game it takes the whole length of my mouse mat to do a 360 (zowie GSR) which is 18.9 inches. why is this? is something wrong? where is the discrepancy? any help is really appreciated. 

[DPI Wizard]

The discrepancy is a combination of the mouse sensor not being exactly 400 DPI and how accurate you can measure manually.

This discrepancy is constant though, so when you convert from one game to another the should feel the same regardless of the output showing the wrong distance due to the factors above.

What results do you get from the DPI Analyzer?