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.
PSA Method Calculator
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.
Input & Iteration Panel
Enter your base sensitivity, then pick the more comfortable value between Lower and Higher each round.
Not started
7 iterations total. Your final sensitivity will appear on the right when done.
Lower
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Base
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Higher
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Sensitivity table
Lower, Base, and Higher values for each round. The current base is highlighted in orange. Final recommendation shown after 7 rounds.
Final Sensitivity
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This is your recommended sensitivity after 7 iterations. Apply it directly or make minor adjustments.
| Lower | Base | Higher |
|---|---|---|
| No data yet — start the test and this table will fill in real time. | ||
Sensitivity is only one part of how aiming feels. If you also want to check your current reflex state, try the reaction speed test before an aim trainer session or a ranked warm-up.
How it works
A quick guide for how to use the PSA calculator: three steps, seven rounds, no guesswork, and no copying someone else's settings.
Read the full PSA Method Calculator tutorial- 1
Enter base sensitivity
Type the in-game sensitivity you currently use as your PSA method starting sensitivity.
- 2
Pick Lower or Higher · 7 rounds
Each round shows two candidates. Test both in-game, choose whichever feels better.
- 3
Get your final value
The algorithm narrows the range round by round and outputs your recommended sensitivity.
Why PSA works
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.
- Converges fast 50% range → ~5% in 7 rounds
- Personalized Tuned to feel, not to a formula
- Fast to run ~5 minutes in any aim trainer
- Repeatable Re-run any time your setup changes
FAQ
Common questions about the PSA method and using this calculator.
Q. How do I use the PSA Method Calculator?
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.
Q. Which game does this work for?
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.
Q. Do I need to change my DPI?
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.
Q. How often should I re-run this?
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.