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 built for repeatable sensitivity testing.

Input Panel

Enter a base value, then choose the easier side.

Base sensitivity

Not started

7 rounds total. Final value appears on the right.

Lower

Base

Higher

Test both values in the same drill before choosing.

Sensitivity table

Round values and the final recommendation after 7 choices.

Lower	Base	Higher
Start the test to fill this table.

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 sensitivity formulas, 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 a repeatable drill
Repeatable Re-run any time your setup changes

What is the PSA Method?

PSA stands for Perfect Sensitivity Approximation. It is a practical way to tune FPS mouse sensitivity by comparing two usable settings at a time, then narrowing the range until your preferred value becomes clear.

Why players use it

Many FPS players change sensitivity by copying a professional player, following a reference chart, or guessing after one bad match. Those methods can be useful references, but they do not know your desk space, mouse grip, aiming style, game role, or how much control you want during corrections.

The PSA Method gives every change a comparison point. Instead of asking whether one number is perfect in isolation, you ask a simpler question each round: does the lower or higher value feel easier to control in the same drill?

Who should use it

PSA is useful for players who feel stuck between two sensitivity ranges: fast enough for turns and flicks, but controlled enough for tracking, recoil control, and small corrections.

It is also useful after hardware or setup changes, such as a new mouse, mousepad, monitor distance, DPI setting, desk height, or a long break from FPS games.

Supported FPS games and use cases

The calculator is game-agnostic. It works best when a game uses a linear in-game sensitivity scale and you test both values under similar aiming conditions.

Tactical shooters

Use PSA when your crosshair placement feels good but micro-adjustments are either too slow or too twitchy. Run the test in a consistent practice drill before moving the number into live matches.

Tracking-heavy games

Tracking-heavy games often expose sensitivity problems during long sprays, strafing duels, and target switching. PSA helps you compare control and speed instead of judging one isolated flick.

Role, scope, and mode changes

For games with different roles, scopes, or engagement distances, use the final PSA value as your base setting, then make small game-specific adjustments if a mode has unusual aiming demands.

Example sensitivity tuning process

A clean test process matters as much as the final number. Use the same mouse, DPI, field of view, monitor setup, and practice routine while you compare lower and higher values.

1

Start with your real setting

If your current sensitivity is 1.00, enter 1.00. The first round compares a lower and higher range around that value, so you do not need to invent a perfect starting number.
2

Test both values in the same drill

Use one repeatable drill such as bot flicks, target switching, or a short practice routine. Changing the drill every round makes the result noisier.
3

Choose the value that costs less effort

Pick the option that lets you correct mistakes, stay on target, and stop on heads with less conscious tension. The best value is not always the one that produces one lucky highlight.
4

Apply the final result carefully

After 7 rounds, try the final sensitivity for a few sessions. If it feels close but not perfect, adjust in very small steps instead of restarting the whole process immediately.

FAQ

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.

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 can use the PSA method. 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.