Mouse sensor test
SlowFast Report Gap Jump
Still test Click Start and let go. Do not touch the mouse or desk for 10 s
Reports—
Rate—
Strokes—
Length—
Checking Result
Not startedFlagged
— Result after about 10 s of drawing 5 checks Report gapsInterval over 3× usual—Cannot tell999/1,000999+longest 888 ms0
JumpsOff course by 10+ px—Cannot tell999/1,000999+max 888 px
Angle snappingStraight runs near axes—799/800 px100% straightlongest 888 px
Hold the left button and draw above: a few big circles, then a few slow slants.
Movement speed
Peak speed—
Average—
Peak IPS—
Time—
Based on DPI. Accurate at default pointer speed with acceleration off
Each stroke
Cleared on refreshClick a row to show its stroke
How to test
About 1 minute01
Draw big circlesChecks report timing02
Draw slow slantsChecks angle snapping03
Move left and rightChecks jumps04
Still, then liftChecks drift and lift-offTipKeep your wrist loose and vary your speed; the checks finish sooner.
How the sensor tracks
The lens projects a lit patch of the desk onto the sensor, which compares thousands of images a second to work out the movement and reports it at the polling rate. Each dot is one report.
1Lens
Dust, scratches or a hair blur the image.
In the testJumps2Light and surface
Glass, mirrors and glossy desks have little texture, so the sensor has no detail to compare.
In the testJumps, reports at rest3Lift-off distance
How high it still tracks. Over 2 mm, lifting moves the cursor.
In the testReports after liftingSymptoms
6 symptomsJagged linesCauseLow polling rateFixSet 1000 Hz in the driver
Report gapsCauseWeak signal or USB powerFixMove the receiver closer
Position jumpsCauseDusty lensFixClean the lens
Slants turn into stepsCauseAngle snapping onFixTurn it off in the driver
Reports at restCauseDirty lens, glossy surface or a faulty sensorFixClean the lens
Reports after liftingCauseLift-off distance too highFixLower it in the driver
Frequently asked questions
9 questionsWhat does this mouse sensor test check?
Five checksLike a mouse tracking test, this mouse tester checks the sensor: steady reports, jumps, angle snapping, drift at rest and lift-off. As a cursor tracker and mouse pointer tester, it colors each report by speed.
Is it a mouse skip, jitter or smoothness test?
Yes, for large jumpsSkipping shows up as report gaps or jumps; jitter of 10 px or more counts as a jump, and smaller jitter shows only in the Jumps strip. There is no smoothness score: the trail itself shows how even the movement is.
Is a jagged trail normal?
Check the polling rateAt 125 Hz the position updates every 8 ms, so fast moves look jagged. From 1000 Hz up the trail should be continuous. Polling rate test →
What usually causes jumps?
Lens or surfaceUsually a dusty lens, a glass or glossy desk, or moving faster than the sensor can track. Try a matte pad and draw a few more circles.
Should angle snapping be off?
Turn it off for gamesAngle snapping straightens movement near the horizontal and vertical. That helps when drawing lines but distorts small aim corrections.
Does system mouse acceleration matter?
Only for speed readingsThe gap, jump and angle snapping checks are not affected. Speeds use your DPI, so they read high with Enhance pointer precision on. Mouse acceleration test →
Why use Chrome or Edge?
They deliver every reportChrome and Edge deliver each raw mouse report to the page, so this also works as a mouse raw input skip test. Browsers that merge reports cannot check gaps or jumps.
What lift-off distance is good?
Under 2 mmLift-off distance (LOD) is the highest the mouse still tracks. Under 2 mm, lifting to recenter barely moves the cursor; many drivers can lower it.
Is the sensor IPS limit high enough?
Usually, yesIPS is inches per second. Gaming mice list 400–650 IPS (10–16.5 m/s); the Movement speed card shows how close your peak gets.