Circularity Test — Stick Rotation Accuracy
Rotate a stick in a full circle and watch the exact shape it traces. This analog stick circularity test maps your rotation against a perfect circle and measures how close — or how far — your stick really gets.
A healthy stick should draw a clean, round path edge to edge. A worn one flattens at the diagonals or bulges off-shape, and that distortion costs you precise movement in-game. The controller stick circle accuracy test below scores your roundness and flags weak points around the rotation. Everything runs in your browser through the standard Gamepad API — no download, no signup, nothing leaves your device.
Press a button to begin
Connect via USB or pair over Bluetooth, then press any button so the browser detects your pad.
Push the stick to the edge and rotate it slowly all the way around.
Trace the full circle once. The lap completes when you've covered the whole rotation.
What the traced shape tells you
The path your stick draws is a fingerprint of its condition. A controller stick circle accuracy test is really a shape-reading exercise — and each kind of distortion points to something specific.
Round and full
The traced path hugs the reference circle all the way around. This is a healthy stick — a high score on any analog stick roundness test.
HealthyFlattened diagonals
The path caves inward at the four corners. The stick can't reach full range diagonally — common as the resistive tracks wear.
WornSquared-off edges
The path forms an octagon instead of a circle. The stick gate or housing is forcing the motion into eight directions.
GatedOval or lopsided
The path stretches on one axis and falls short on the other. One direction of travel is worn or mis-calibrated more than the rest.
UnevenReading your circularity score
The tool turns your circularity error into a 0–100 score. Here's what each band means.
Excellent
Very round, low circularity error. The stick tracks accurately edge to edge.
Fair
Some distortion you may feel in precise movement. Worth a clean and a re-test.
Poor
Clearly off-shape. Range or accuracy is compromised — repair or replacement is likely.
A circularity error test reads best once you've covered the full rotation — partial laps only score the section you traced.
Why circularity matters in real games
An off-shape stick doesn't just look wrong on a joystick rotate circle test — it changes how your character actually moves.
Aiming in shooters
Flattened diagonals mean your crosshair moves slower on the diagonal than the cardinal directions — tracking a target feels inconsistent.
Steering in racing
A lopsided shape gives uneven steering input left versus right, so the car pulls differently into each corner.
Movement in platformers
A squared-off, gated path snaps motion into eight directions, making smooth diagonal movement hard to hold.
Running the circularity test
A clean result takes one slow, deliberate lap of the stick.
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1
Connect and pick a stick
Link your pad, then choose the left or right stick to test.
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2
Push fully to the edge
Hold the stick at its outer limit — partial pressure skews the shape.
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3
Rotate slowly, one full lap
Trace the whole circle steadily until coverage reaches 100%.
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4
Read the score
Check your circularity score and the traced shape against the reference circle.
Common testing mistakes
These are the things that throw off a result — avoid them for an accurate read.
Rotating too fast
A quick spin skips sectors. Move slowly so every angle is recorded.
Not reaching the edge
Holding the stick partway in reads as poor range, not poor roundness.
Stopping mid-lap
The score only finalises near full coverage — finish the whole circle.
Judging on one lap only
Run it two or three times — a single odd lap isn't a verdict.
Improving a poor circularity score
A low score isn't always permanent. Work through these from the simplest fix upward.
Clean the stick
Compressed air around the collar clears debris that distorts the path. Re-test afterwards — light cases often improve.
Exercise the full range
Several slow full rotations can settle a stiff stick and even out a slightly uneven shape before you re-measure.
Check the deadzone setting
An aggressive in-game deadzone can clip the shape. Test in a game with a low deadzone for a truer picture.
Replace the stick module
A consistently poor score from worn tracks means the module — or the controller — needs replacing.