What it detects
Test vertical mouse-wheel or trackpad events. See separate pixel, line and page totals, rates and direction changes, with the actual test duration.
Mouse Wheel Diagnostics
Scroll Speed Test
Test vertical mouse-wheel or trackpad events. See separate pixel, line and page totals, rates and direction changes, with the actual test duration.
Scroll Speed Measurement
Totals in each unit
Direction Change Detection
Direction-change check
Test Settings
Choose a duration, then scroll vertically inside the test area. Settings stay fixed during each run.
About the Scroll Test
• Pixel, line and page deltas stay separate. They are browser scroll amounts, not physical wheel distance; no unit conversion or skill ranking is applied.
• Notched wheels report chunky fixed steps, while free-spinning wheels and trackpads report a smooth stream of small deltas - both are measured correctly.
• Unexpected direction changes can come from the wheel, trackpad inertia or software. Repeat steady one-direction scrolling and compare another device before diagnosing hardware.
• Compare only the same unit, browser, operating system and device settings. These results are not a cross-device skill score.
• For persistent skipping or reverse scrolling, follow the manufacturer's cleaning guidance and compare another computer before seeking repair.
• Compare free-spin and notched modes in separate runs, using the same native units and settings.
What the scroll test measures
Compare only the same unit, browser, operating system and device settings. These results are not a cross-device skill score.
Both mouse wheels and trackpads work here. For hardware diagnostics, a real wheel gives the clearest signal.
What unusual results can mean
Unexpected direction changes can come from the wheel, trackpad inertia or software. Repeat steady one-direction scrolling and compare another device before diagnosing hardware.
Wheel and trackpad differences
Notched wheels send large discrete steps, free-spin wheels send rapid bursts, and trackpads send smooth deltas with inertia - peak speeds differ hugely.
Browser and system limits
The page reads wheel events after OS scroll-speed settings and browser scaling are applied, so system settings directly shift the numbers.
Mobile limits
Touch scrolling on phones uses touch events, not wheel events, so this test is meant for computers with a mouse or trackpad.
Scroll Test FAQ
Common questions about scroll speed and wheel problems
How does the scroll test measure speed?
Pixel, line and page deltas stay separate. They are browser scroll amounts, not physical wheel distance; no unit conversion or skill ranking is applied.
Why does my page jump back up while scrolling down?
Unexpected direction changes can come from the wheel, trackpad inertia or software. Repeat steady one-direction scrolling and compare another device before diagnosing hardware.
Why do I get different scores in different browsers?
Compare only the same unit, browser, operating system and device settings. These results are not a cross-device skill score.
My wheel scrolls but clicking it does nothing - can this test check that?
Use the Double Click Test to check the middle mouse button. This page records vertical wheel movement.
Can I test trackpad scrolling here?
Yes. Trackpad scrolling can produce the wheel events recorded here. Compare runs using the same native unit and setup; inertia and device settings can change the result.
Need More Help?
If you have questions about your scroll test results, contact our support team.
Contact SupportMore Click & Speed Tests
Every tool in the click-test family runs in your browser for free — pick the test that matches what you want to measure.
CPS Test
The all-round clicks-per-second test with mouse and keyboard modes and multiple durations on one page.
Spacebar Test
Count spacebar presses per second, or use unlimited counter mode to see how long you can keep going.
Right Click Test
Measure right-button CPS and click intervals. Use the Double Click Test for a closer look at suspected extra clicks.
Mouse Double Click Test
Review short intervals on five mouse buttons with an adjustable threshold; short intervals alone do not confirm a fault.
Jitter Click Test
Practice the arm-tension jitter technique and see how many extra clicks per second it earns you.
Butterfly Click Test
Alternate two fingers on one button and measure the click rate the butterfly technique unlocks.
Kohi Click Test
The classic Minecraft PvP benchmark: measure your CPS the way the Kohi server made famous.
Mouse Polling Rate Test
Observe mouse movement rates delivered by the browser and the available sampling method.