Scroll Wheel Test
Scroll up and down over the test area. Each vertical wheel event adds to the count.
Distance is estimated in CSS pixels. Large events can come from fast scrolling, acceleration, or the browser grouping wheel events.
Local history
Save a result to keep it in this browser. History holds your five most recent saved results for this test.
No saved results yet.
How to use the Scroll Wheel Test
How do I check for backwards scrolling?
Turn the wheel slowly in one direction while the pointer is over the test area. Watch the Up and Down counters. Check your system’s scrolling direction setting first if the whole test consistently reports the opposite direction.
What does movement in pixels measure?
The page displays browser wheel deltas as approximate CSS pixels, including estimates when the browser reports lines or pages. One physical notch can produce several events, and fast scrolling can produce larger events through acceleration or grouping.
How should I compare two runs?
Use the same browser, speed and settings, then reset between runs. Use Review wheel results to capture the current counts and save them in this browser.