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Perfect Sensitivity Finder

Used by professional aimers, the PSA (Perfect Sensitivity Approximation) calculator uses a mathematical bisection algorithm to narrow down your absolute perfect tracking speed in 7 simple steps.

Enter Starting Sensitivity

Pick a sensitivity that allows you to do exactly one 360° turn from the left edge of your mousepad to the right edge.

How the PSA Calculator Works

The Perfect Sensitivity Approximation (PSA) method is a widely used technique in the tactical shooter community (especially in CS2 and Valorant) to find a player's ideal mouse sensitivity. Instead of blindly guessing, the PSA method uses a binary search algorithm to methodically narrow down your aiming speed based on physical feel.

1

Find your Base

Start by finding a sensitivity that allows you to complete exactly one 360-degree turn by swiping from the left edge of your mousepad to the right.

2

Test High and Low

The calculator multiplies your base by 1.5x and 0.5x. You test both extremes in-game and choose which feels more natural.

3

Iterate & Converge

Your chosen sensitivity creates a new "bound". The calculator averages them out and gives you two tighter options. After 7 steps, you hit mathematical perfection.

Pro Tips for Testing

  • Don't flick, Track: The best way to test sensitivities isn't by flicking. Load into a custom map with moving bots (like aim_botz). Keep your crosshair locked on a bot's head while you physically strafe left and right.
  • Look for jitter: If your crosshair jitters or skips ahead while tracking, the sensitivity is too high. If you find your arm lagging behind the bot or falling off your mousepad, it's too low.
  • Give it 5 minutes: Don't just swipe once and decide. Play with the "Lower" sens for 3-5 minutes to let your brain adjust, then switch to the "Higher" sens for 3-5 minutes.