Perfectly match your muscle memory across different game engines.
Game engines process mouse movement differently. A sensitivity of "1.0" in the Source engine (CS2, Apex) is vastly different from a "1.0" in the Unreal Engine (Valorant, PUBG). To get a perfect 1:1 match, we use the engine's hidden "Yaw" value.
The mathematical formula for converting sensitivity between any two games is:
$ Sens_2 = \frac{Sens_1 \times Yaw_1}{Yaw_2} $
Effective Dots Per Inch (eDPI) is the true measurement of your mouse speed. Because players use different hardware DPIs (400, 800, 1600) and different in-game sensitivities, it is impossible to compare settings just by looking at the in-game number.
eDPI = Mouse DPI × In-Game Sensitivity
By calculating your eDPI, you can directly compare your true aiming speed to esports professionals in games like CS2 or Valorant, regardless of what mouse they use.