Forturama

i just mentioned that part because i noticed the changed fov that didn't really make any sense 
 <- all o the first should do just replace the second overwatch with any other game 
 
once you are used to using 0% there shouldn't be a "change " in feeling might just take a while initially 

you don't have to manually match anything 

this is already the correct way just use all and use the given values the calculator does the rest for you .
 
 
https://www.mouse-sensitivity.com/?share=19a3c605c14fb8e5fa4f20dd6ac4b715
this would be what you would do if you wanted to play apex legends with your overwatch sens
 
the only time you want to have the same distance is when you have got the same field of view. ( if the fov is different as in scopes matching the distance will not feel the same  so we use what some call  0% / visumotor / focal length for the most consistent experience )
 
the distance changed based on the change in fov the feel stays the same 

It's using the wrong max value, so the calculation is correct but impossible to set. Working on an update to fix this now. BTW, if you want the same 360 distance for ADS, disable Sens FOV Scale.

In the conversion setup set the Normal conversion to 360 Distance.

in-game slider is based on 4:3.