PSA Calculator – FPS Mouse Sensitivity Finder
Perfect Sensitivity Approximation - Find the perfect mouse sensitivity for your FPS games
Supports professional settings like CSGO pro sensitivity, CS2, Valorant, and more.
Start PSA Test
Instructions:
- 1. Find a fixed target in your game
- 2. Adjust sensitivity so a full mousepad swipe equals exactly 360 degrees
- 3. Enter this sensitivity value and start testing
Iteration 1
Lower
0.00
Base
0.00
Higher
0.00
Testing Method: Test these three sensitivity values on static targets at long, medium, and close distances in-game, then choose the one that feels most comfortable.
🎯 Perfect Sensitivity Found!
Your Perfect Sensitivity
Calculated through 7 scientific iterations
🎮 Usage Recommendations
- Apply this sensitivity setting to your game
- Stick with it for at least 2-3 weeks to let muscle memory adapt
- Practice with aim training software for further improvement
- Avoid frequent sensitivity changes - consistency is key
Your iteration progress and history will appear here once you start the PSA calculation.
Iteration Progress
Iteration History
Scientific Method
Based on professional esports training methods, find your optimal sensitivity through iterative testing
Universal Compatibility
Works with CS2, Valorant, Apex Legends, CSGO, Overwatch 2, Rainbow Six Siege, and any other FPS title. No game-specific setup required — just enter your 360° sensitivity and start.
Continuous Optimization
Through multiple iterations, gradually refine to your most suitable sensitivity setting
About PSA Method
The Perfect Sensitivity Approximation (PSA) method is a systematic, binary-search approach to finding your optimal mouse sensitivity for FPS games. Unlike guessing or copying pro player configs, PSA narrows the gap between a lower and higher sensitivity each round until it converges on the value that feels most natural to you — based on your own mousepad, grip style, and play habits.
The process runs 7 iterations. In each round you compare three values (lower, base, higher) by testing them on real in-game targets at various distances. By consistently choosing whichever option feels best, the algorithm homes in on your ideal sensitivity in about 10–15 minutes of actual gameplay. The result works across CS2, Valorant, Apex Legends, CSGO, and any other FPS title — because it's calibrated to your personal feel rather than any game's defaults.
How to Use PSA Calculator
- In-game, find a sensitivity where one full mousepad swipe rotates your view exactly 360°
- Enter that value above and click Start PSA Calculation
- Test the three suggested values (lower / base / higher) on real in-game targets
- Choose whichever feels most comfortable — the range tightens each round
- Complete all 7 iterations to lock in your perfect sensitivity
Get Support & Feedback
Have questions about PSA methodology or need help optimizing your sensitivity? Our team is here to support your competitive gaming journey.
Frequently Asked Questions
What is the PSA method for FPS games?
PSA stands for Perfect Sensitivity Approximation. It is a binary-search method that runs 7 comparison rounds to find your ideal in-game mouse sensitivity. Each round presents three values — you pick the one that feels best, and the range narrows until it converges on a precise result.
What sensitivity value should I enter to start the PSA test?
Go into your game and find a sensitivity where one complete mousepad swipe (edge to edge) rotates your view exactly 360 degrees. Enter that value as your base. This gives the PSA algorithm a calibrated starting point independent of DPI or mousepad size.
Which FPS games work with PSA Calculator?
PSA Calculator works with any FPS game that lets you adjust mouse sensitivity — including CS2, Valorant, Apex Legends, CSGO, Overwatch 2, Rainbow Six Siege, Call of Duty, and more. The output is an in-game sensitivity value relative to the game you used for calibration.
How long does the full PSA test take?
The 7-iteration process typically takes 10–20 minutes of in-game testing. Each iteration requires a short session on a practice range or aim trainer to compare three sensitivity values at long, medium, and close distances.
What is eDPI and how does it relate to PSA results?
eDPI (effective DPI) is your mouse hardware DPI multiplied by your in-game sensitivity — for example, 800 DPI × 1.5 sens = 1200 eDPI. PSA outputs an in-game sensitivity number. After your test, multiply it by your DPI to get your eDPI, which lets you compare your setting with other players regardless of hardware differences.
Should I just copy a pro player's sensitivity settings?
Pro settings are a useful reference, but sensitivity is highly personal. It depends on your mousepad size, grip style, arm-vs-wrist ratio, and monitor resolution. PSA personalizes the result to your own feel rather than defaulting to someone else's setup. Use pro settings as a rough ballpark, then let PSA dial it in precisely.
How often should I redo the PSA test?
Once you find your sensitivity, stick with it for at least 2–3 weeks to allow muscle memory to develop. Re-run PSA only if you significantly change your setup: new mousepad, different DPI, new monitor size or resolution, or a change in seating position.
Why does PSA use exactly 7 iterations?
Seven rounds of binary search narrow the starting range to less than 1% of its original width. In practice, the difference between adjacent values at that precision is imperceptible in normal gameplay — meaning the algorithm has effectively found your true optimum. Fewer rounds leave too much uncertainty; more rounds offer no meaningful gain.