Thanks for the new method, I'll try that out. There's still the discrepancy between 400 dpi * 8.6 sens and 800 dpi 4.3 sens. Does modern warfare treat dpi in a weird manner? I retested this using firefox and chrome to see if results changed: http://imgur.com/a/npq4O Theres still a discrepancy of seta sensitivity "0.979408" for 800 dpi and seta sensitivity "1.958815" for 400 dpi. Edit: after testing ingame 0.89 gives a cm 360 of around 65-75 not 44. My rough value of 1.769 gives around 41-43 cm/360 at 80 fov. Not sure what the issue is, but the calculator seems to struggle at 800 dpi.