How to Use
1
Press Start Test — the first target appears at a random position in the zone.
2
Click as close to the center of the target as possible.
3
Your deviation in pixels is shown instantly — lower is better. A green dot marks where you clicked.
4
If you click outside the target it counts as a miss. The zone flashes red and a deviation line shows how far off you were.
5
After all targets, see your average deviation, hit rate, and precision tier. Click Reset to try again.
Keyboard Shortcuts
Space
Start test / skip to next target
R
Reset the current test
F
Toggle fullscreen mode
S
Open / close Settings
H
Open / close Help
Esc
Close any open panel
Reading Your Results
After each test you'll see your average deviation (avg px from center across all shots), your best single shot, and your hit rate (how many targets you landed on). The chart below the zone shows each shot individually so you can spot patterns — are your misses consistently off in one direction?
Precision Tiers
Your tier is based on average deviation across all shots in a test.
< 5px
🎯 Pixel Perfect
Top 1%
15 – 30px
Average
Top 50%
> 60px
Needs Work
Bottom 20%
Typical Benchmarks
25–50px
Casual / trackpad users
Note: these benchmarks are for medium (44px) targets at native desktop resolution. Smaller targets and higher DPI will naturally increase deviation.
How Deviation is Calculated
Deviation uses the Euclidean (straight-line) distance formula: √((x₁−x₂)² + (y₁−y₂)²) where (x₁, y₁) is your click and (x₂, y₂) is the target center. A result of 0px is a perfect dead-center hit.
Fitts' Law
Fitts' Law predicts that the time to hit a target is proportional to the distance to the target divided by its width: T = a + b · log₂(2D/W). Larger targets and shorter distances are faster to hit. This is why this tester uses randomised positions — it controls for the distance variable to isolate precision.
Motor Control & Proprioception
Click accuracy depends on your brain's internal model of where your hand is in space (proprioception) and its ability to issue fine motor corrections. The cerebellum processes timing and trajectory errors. Repeated practice rewires these cerebellar circuits — this is why accuracy genuinely improves with daily training.
Visual-Motor Latency
Your eyes take approximately 13ms to detect a visual change. After detection, a motor command takes 50–100ms to reach your hand. This total latency of ~70–200ms means there is always a slight gap between when you perceive the target center and when your click registers. Lower system input lag reduces the effective gap.
Screen Resolution & Pixel Density
Deviation is measured in CSS pixels, which are resolution-independent units. On a 4K display at 200% scaling, a CSS pixel corresponds to 2 physical pixels. This means your deviation score is comparable across different displays as long as the browser zoom level is at 100%.
Mouse Polling Rate
A mouse with a 125 Hz polling rate reports its position every 8ms. At 1000 Hz it reports every 1ms. Higher polling rates mean the cursor position at the moment of click is more accurately captured, slightly reducing apparent deviation for fast-moving clicks.
About This Tool
The Click Accuracy Tester is part of the ClickTests.net suite of free, browser-based input device tests. All processing happens locally in your browser — no data is sent to any server.
Accuracy & Limitations
Browser Coordinate Precision
Click coordinates are captured via MouseEvent.clientX/Y at sub-pixel precision. The result is rounded to the nearest whole pixel for display.
Display Scaling
If your browser or OS display scaling is not at 100%, CSS pixels may not correspond to physical pixels. For the most accurate comparison, use the test at 100% browser zoom.
Touch Devices
Touch coordinates have lower precision than mouse coordinates (typically ±2–5px depending on the device). Touch results are not directly comparable to mouse results.
Version History
v1.2Mar 2026
- Added tabbed Settings and Help panels
- Added target movement (slow/fast drift) mode
- Added Tiny (16px) target size
- Added JSON history export
- Responsive round-strip for mobile
v1.1Feb 2026
- Added deviation line and click marker visuals
- Added shot-by-shot bar chart
- Added personal best banner and session stats
v1.0Jan 2026
- Initial release — 10-target accuracy test with deviation scoring
Other Tools
Explore the full suite at clicktests.net — including Reaction Time Tester, Double Click Tester, Jitter Click Tester, Butterfly Click Tester, and more.