Q. What sensitivity should I start with?
Whatever you already use. PSA corrects bad starting points quickly — round 1 already explores ±50%, so you don't need a "good" guess.
Use this PSA method sensitivity calculator to find your perfect FPS mouse sensitivity in 7 binary-search rounds. Free, browser-based, and works for Valorant, CS2, Apex Legends, Overwatch 2, Fortnite, PUBG, and Call of Duty Mobile.
Enter your base sensitivity, then pick the more comfortable value between Lower and Higher each round.
Lower, Base, and Higher values for each round. The current base is highlighted in orange. Final recommendation shown after 7 rounds.
| Lower | Base | Higher |
|---|---|---|
| No data yet — start the test and this table will fill in real time. | ||
A quick guide for how to use the PSA calculator: three steps, seven rounds, no guesswork, and no copying someone else's settings.
Type the in-game sensitivity you currently use as your PSA method starting sensitivity.
Each round shows two candidates. Test both in-game, choose whichever feels better.
The algorithm narrows the range round by round and outputs your recommended sensitivity.
A converging binary search built around how aim actually feels — not a formula based on someone else's hand.
PSA (Perfect Sensitivity Approximation) starts wide — round 1 spans 0.5× to 1.5× of your base — so even a bad starting guess gets corrected fast. After each pick, the range shrinks toward your preference, ending around ±5% by round 7.
Unlike static formulas (eDPI matching, cm/360), this PSA method mouse sensitivity workflow tunes to your aim style: flick-heavy or tracking-heavy, wrist or arm. The output is a number that already feels right, not one you'll fight for a week.
Common questions about the PSA method and using this calculator.
Whatever you already use. PSA corrects bad starting points quickly — round 1 already explores ±50%, so you don't need a "good" guess.
Enter your current in-game sensitivity, test the lower and higher values each round, and choose whichever feels better. After 7 rounds, the calculator gives you a final recommended sensitivity.
Any FPS with a linear sensitivity scale — Valorant, CS2, Apex, Overwatch, R6, COD, etc. The algorithm is game-agnostic; only the conversion to in-game units differs.
No. PSA tunes the in-game multiplier; DPI stays where it is. You can use the PSA method with common settings like 800 DPI or 1600 DPI, and if you change DPI later, just re-run PSA from your new effective sens.
Whenever your setup changes — new mouse, new mousepad, new monitor distance, or after a long break from FPS games. Otherwise once a year is plenty.