Perfect Sensitivity Guide

Perfect Sensitivity Guide
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Prerequisites:
A mouse with customizable dpi
mouse acceleration must be turned completely off (you can look up tutorials online)
A willingness to use a different sensitivity

WARNING: Resulting sensitivity is probably much lower than you are used to!

Step 1:
Measure your mouse space. If you have a mousepad, measure the side that's currently horizontal (or for circular ones, measure the diameter). If you don't have a mousepad, measure the horizontal desk space. You should know how far is too far if you have /that/ much room.

The measured amount should turn your in-game character 540 degrees; in other words, a 360 + 90-degree buffers at the sides.
As such, the buffer room on each side should be 1/8th the distance you measured.

For calculatory purposes, this will be represented by taking your measured amount and subtracting 1/4th. The resulting number will be your FINAL SENSITIVITY - your inches/360.

Step 2:
Pull up the following website: http://www.notalent.org/sensitivity/sensitivity.htm
This is where we will be doing all our calculations.

Leave m_yaw at 0.022.
Windows multiplier: Go to Control Panel -> Hardware and Sound -> Mouse -> Pointer options. The amount of "clicks" from the left the slider is is the Windows Sensitivity. Set it to the 6th click from the left: a sensitivity multiplier of 1.

Step 3:
Using your inches/360, calculate the amount of inches it will take to turn your character the same amount of degrees as your FOV.
This is the distance your mouse should travel when going from one end of your desktop to the other end, horizontally (not corner-to-corner).

Use trial-and-error to find the dpi setting that achieves this. Do not use the calculator, measure the distance physically and move your mouse that amount.

The resulting dpi should be rounded to the nearest 100 - 50 dpi isn't going to make /that/ much of a difference, and it makes things easier. Your mouse also probably only allows you to make 100 dpi increments while changing it.

Step 4:
Plug in the calculated dpi into the calculator. Using trial-and-error, find the in-game sensitivity that results in your calculated inches/360.

Step 5:
Change your in-game sensitivity to the calculated amount.

EXAMPLE:
I have an inches/360 of 8.5 inches. I have an FOV of 90, or 90 degrees. My mouse travels across my desktop in 8.5 x 0.25= 2.125 inches with 1200 dpi. After plugging that in, I get an in-game sensitivity of 1.6.