Small corrections and stopping
For tactical shooters, repeat a short drill with the same targets and weapon. Compare overshooting, stopping on target, and the turns your mousepad space allows. Choose for repeatable control, not one lucky shot.
PSA Method Calculator
The PSA Method Calculator is a free sensitivity calculator that helps you compare candidates for a comfortable FPS mouse sensitivity by comparing two values at a time over 7 rounds. PSA stands for Perfect Sensitivity Approximation.
7 rounds · test both values in-game · no signup
Compare your sensitivity
Test both values in your game, then choose the easier one to control.
Enter your in-game sensitivity, not DPI or eDPI. Keep DPI fixed. Calculates automatically; editing starts a new test. Progress stays in this tab.
Not started
7 rounds. Compare both values in-game before each choice.
Lower
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Base
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Higher
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Test both values in the same drill before choosing.
Sensitivity table
Round values and the final recommendation after 7 choices.
Final Sensitivity
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Keep DPI fixed. Compare this value with your original setting over several practice sessions, noting overshoots, turns and comfort. Retest after a break if neither is consistently better.
| Lower | Base | Higher |
|---|---|---|
| Your first choice will appear here after you compare both values in-game. | ||
Make each comparison count
This tool narrows a preference range. It does not measure your aim or guarantee a perfect sensitivity.
Keep the setup fixed
Record your game, DPI and starting sensitivity. Keep your weapon, practice task and available mouse space the same.
Compare equal practice blocks
Try each candidate for 30–90 seconds as a practical starting routine, not a validated measurement standard. Compare overshoots, short turns and correction effort; reverse the order on a second attempt.
When neither is clearly better
Repeat the comparison after a break. You can leave this tab open and resume later. Do not force a choice from one lucky shot or keep testing through discomfort.
Worked example: starting at 1.00
Illustrative choices only, not a player performance record. Your own choices should come from testing both values in-game.
Next base = (current base + chosen candidate) ÷ 2. Display values use at least two decimal places, with extra precision below 1; calculations retain number precision. The first Lower choice changes the base from 1.00 to 0.75, not 0.50.
| Round | Lower | Higher | Example choice | Next base |
|---|---|---|---|---|
| 1 | 0.50 | 1.50 | Lower | 0.75 |
| 2 | 0.375 | 1.13 | Higher | 0.938 |
| 3 | 0.563 | 1.31 | Higher | 1.13 |
| 4 | 0.787 | 1.46 | Lower | 0.956 |
| 5 | 0.765 | 1.15 | Higher | 1.05 |
| 6 | 0.947 | 1.16 | Higher | 1.10 |
| 7 | 1.05 | 1.16 | Lower | 1.08 |
Check your result
Keep the same DPI and compare the result with your original setting across several practice sessions. Record control and comfort as well as scores. If problems persist, repeat under rested, consistent conditions. This is a starting point, not evidence of improved aim.
How it works
A quick guide for how to use the PSA calculator: three steps, seven rounds, consistent comparisons, and your own in-game feedback.
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
Validate the final value
Copy the result, keep DPI fixed, and compare it with your original setting over several practice sessions.
What the comparison tells you
A sequence of paired comparisons guided by your in-game feedback. It narrows candidate offsets; it does not measure performance or prove an optimum.
PSA (Perfect Sensitivity Approximation) first compares 0.5× and 1.5× of your starting value. Each choice moves the base halfway toward the selected candidate. Later candidate offsets decrease, reaching ±5% of the current base in round 7.
The calculator uses your choices; it does not observe your aim, grip or scores. Keep the drill consistent so each choice reflects the same task, and validate the result over several practice sessions.
- Smaller comparisons Candidate offsets decrease from ±50% to ±5%
- Your preference Based on your choices in the same drill
- Take your time Seven rounds; test both candidates each time
- Repeatable Re-run any time your setup changes
Choose the right comparison for your game
Use the numeric sensitivity from the game you are testing. This calculator does not convert sensitivity between games or automatically apply a setting.
Tracking and target switching
Use the same moving-target drill for both candidates. Watch whether you stay on target and can change direction comfortably. Keep the camera, field of view and test duration consistent.
Hip-fire and scoped aiming
Test one aiming mode at a time. A comfortable base sensitivity does not establish the right ADS or scope multiplier. Record the mode with your result and compare other modes separately in the game.
FAQ
Common questions about the PSA method and using this calculator.
What sensitivity should I start with?
Whatever you already use. Start from a usable setting and compare both candidates in-game. The first round explores ±50%, but cannot guarantee a suitable result from every starting point. If either candidate is difficult to control, repeat a short drill before deciding. Keep enough mousepad space for the turns you actually need in your game.
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. Keep DPI fixed and use the same drill for both candidates. Compare tracking, flicks, and small corrections, then validate the final value over several practice sessions before committing to it.
Which game does this work for?
Use it with a game that lets you enter numeric mouse sensitivity and has a linear sensitivity scale. Enter the sensitivity shown in that game and apply each candidate there manually. The calculator does not detect your game or convert its units. Keep the same aiming mode throughout the test; compare hip-fire and scoped sensitivity separately.
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. Record your DPI alongside the final sensitivity so that you can reproduce the same setup next time.
How does the PSA sens calculator relate to eDPI?
The PSA sens calculator helps you choose an in-game sensitivity through testing; eDPI describes that setting together with your mouse DPI. Multiply DPI by in-game sensitivity: 800 DPI at 1.25 sensitivity is 1000 eDPI. Keep DPI fixed during PSA, then calculate eDPI from your final result. Compare eDPI within the same game, since different games can use different sensitivity scales.
Can I use the PSA method calc to convert between games?
The PSA method calc compares sensitivities within the game you are testing; it does not convert settings between games. Start with a usable sensitivity in your destination game, keep its settings fixed, and test each candidate there. A result of 1.00 in one game need not produce the same turning distance in another, so validate the result separately for each game.
How does the PSA method calculation work after each choice?
Each PSA method calculation generates candidates by multiplying the current base by the round's lower and higher factors. The next base is the average of the current base and your chosen candidate. Starting at 1.00 gives 0.50 and 1.50; choosing Lower makes the next base 0.75. Candidate offsets shrink across seven rounds, while your in-game comparisons determine which direction to take.
What if both values feel the same or the game rounds them?
Repeat the same drill with the testing order reversed before choosing. If the game accepts fewer decimal places, use the closest values it supports. When both candidates become the same in-game setting, the comparison cannot distinguish them: keep a usable setting and validate it over later sessions instead of treating extra decimal places as extra accuracy.