What This Site Does
The calculator guides you through 7 rounds of binary choices. You enter your current sensitivity, compare a lower and higher option each round, and finish with a narrowed-down sensitivity value that fits how you actually aim.
Why PSA
PSA stands for Perfect Sensitivity Approximation. It is useful because it starts with a wide range and quickly narrows toward the option that feels better in practice. That makes it more personal than copying another player's settings or relying only on a fixed formula.
Who It Is For
The tool is built for FPS players who want a repeatable way to tune sensitivity for games such as Valorant, CS2, Apex Legends, Overwatch 2, Rainbow Six Siege, and Call of Duty.
How It Is Built
The calculator runs in your browser. It does not require an account, and the core calculation happens on the page while you use it.