Steady Hand Test: Measure Mouse Tremor

This game measures mouse movement and needs a real pointer cursor. On a touchscreen, come back with a mouse or trackpad.

Calibrate your screen

Hold a debit or credit card up to the screen and drag the slider until the rectangle matches the card exactly. This is how we convert pixels to millimetres.

Card width: px ( mm)

The calibration only applies to this screen at this resolution. Recalibrate after switching monitors or changing display scaling.

Leaderboard

Fast clicking puts strain on your wrist and fingers, so take a short break between rounds.

What the test measures

The test records your cursor position roughly 100 times a second for 10 seconds and compares every point to your starting position. The distances feed into the RMS deviation (root mean square) in millimeters, a value that weighs small, constant tremor more heavily than a single brief spike.

Why millimeters, not pixels

A pixel means something different on a 4K monitor than on an old laptop screen. Calibrating with a bank card translates pixels into millimeters for your specific screen, only then do results become comparable across devices. The optional DPI field adds context too: a high-resolution mouse reports every micro-movement more clearly than a coarse one.

Training a steady hand

A steady mouse hand helps with precise aiming in shooters and careful selections in photo editing, and, only half-jokingly, would not hurt for stitching a surgical suture either. Testing regularly makes it easy to notice whether tiredness, coffee, or a new mouse is affecting your steadiness.

Frequently asked questions

Answers to common questions about the steady hand test

RMS stands for root mean square. The test measures the distance from each recorded point to your starting position, squares it, averages across all points, and takes the square root. Large, rare outliers weigh more heavily than in a plain average, so a single brief jerk noticeably pushes the result up.

Under 1 mm counts as very steady, 1 to 3 mm is normal for most people. Values above 5 mm usually point to tiredness, an awkward hand position, or a very sensitive mouse rather than actual tremor.

The second before the run starts only gets your cursor into the circle. All that counts there is staying inside, not how still you are. Once the actual measurement begins, every movement away from your starting point counts toward the RMS deviation.

If the cursor leaves the play area, measurement points go missing or coordinates jump unpredictably, and a clean RMS value is no longer possible. Leaving the target circle itself is fine, though, and simply counts as part of the deviation.

Your mouse's DPI sets how finely it resolves movement, but it does not change the actual measurement in millimeters. The field is only there to add context when comparing results; the server neither stores nor checks it.

Steady hand test: putting your hand steadiness in numbers

The steady hand test measures how still you can hold the cursor on one spot over ten seconds. Measurement starts automatically after one second inside the target circle, and from then on every deviation from your starting point counts.

What people use the steady hand test for

Fine motor check: A fast, repeatable number for how steady your hand actually is on a given day, no prior knowledge or setup needed.
Photo editing & design: Anyone doing selections, retouching, or pen tool work benefits directly from a steady hand, and the test shows exactly where things stand right now.
Gaming aim: Precise aiming in shooters starts with raw control over the mouse, independent of sensitivity settings or weapon practice.

How a run works

1 Move the cursor into the circle and stay there.
2 Measurement starts automatically after one uninterrupted second inside the circle.
3 Hold as still as you can for 10 seconds, without leaving the play area.
4 Result: RMS deviation, peak drift, and total path, all in millimeters.

What sets this test apart

A live heatmap trace makes every micro-movement visible right away, drawn at a magnified scale so even small tremor shows up as a growing spot. Scoring uses the RMS deviation from the very first measured point, not the circle's center, so where a run actually begins is set entirely by your cursor position at the start. Submitting to the leaderboard sends roughly a thousand measurement points to the server, which recomputes RMS deviation, peak drift, and path length independently.

Free tools that pair well with this one – right in your browser, no sign-up.

Mouse Arena Seven games for click speed and precision CPS Test Measure your clicks per second Kohi Click Test Kohi-style 10-second click test Click Rhythm Hold a steady click rhythm

Steady Hand Test