I think perhaps this calculator is off. As far as I'm aware, the game has been updated since the calculator was put on here. I have sensitivity 1 in csgo, 1600 DPI, 1920x1080 resolution, default WPS (center position). I use 100 FOV in Devil Daggers, and the calculator tells me that 0.064 is the conversion to Devil Daggers. This is way too low. Around 0.104 seems correct when I measure it.
I think it has something to do with FOV? Because when I put in my settings, it gives me "Actual HFOV: 106.260205 degrees" for csgo, "Actual HFOV: 129.465984 degrees" for Devil Daggers and a "Max discrepancy: -0.0072%".
This calculation with these values gives 104:
(0.064*2)*(106.260205/129.465984)*(1-0.0072) = 0.10430057701
I have no idea why 0.064 needs to be doubled, but it does for this calculation and it gives my the perfect sensitivity conversion for Devil Daggers. Anyway this can be fixed? I think the creator of Devil Daggers (m4ttbush) are more than willing to share the sensitivity formula in Devil Daggers if he is asked. He hangs around the DD Pals discord here: https://discord.gg/5VXWx58p