Ticks / sec
0
Direction —
Avg px / tick 0
Ticks 0
Scroll anywhere in this panel with the wheel
Mouse scroll & scroll speed test
Run a scroll speed test in your browser — roll the wheel over the pad and read ticks per second, direction, average pixels per tick, total tick count, and a 48-bar consistency graph.
Scroll speed test & mouse wheel checker — tick rate online
WheelEvent delta reports how far each notch should move content. Windows and macOS multiply that by scroll speed; browsers may smooth or coalesce ticks. This test surfaces ticks per second, average step size, and a 48-tick bar graph so you can spot a failing encoder before it becomes daily friction.
Delta modes
Browsers report delta in pixels (0), lines (1), or pages (2). Most mice use pixel mode in Chrome and Edge; line mode appears in some Firefox paths. This test normalizes to pixels for comparison.
Tick vs smooth scroll
Free-spinning wheels may emit rapid small deltas — watch ticks per second and the bar graph to see burst behavior.
One-way failure
If direction never flips when you roll the other way, or ticks stop entirely, the encoder or firmware filter is likely at fault — not a browser setting.
Middle click wear
A wheel that middle-clicks when scrolling often means a worn switch stack. Log scroll here, then press-test middle click on the mouse test center.
When to use this test
How to test if mouse scroll is working
If pages barely move or only scroll one way, this pad shows whether the browser receives wheel events and how large each tick is.
Skipped or uneven wheel steps
Compare average delta and max tick — erratic jumps or missing ticks often mean a dirty encoder or worn wheel mechanism.
Before a return or RMA
Screenshot the consistency graph when the wheel skips, double-scrolls, or reverses direction — useful proof alongside button tests.
Scroll speed test benchmark
Use ticks per second as a scroll speed readout — spin the wheel fast and see how many wheel events arrive each second. Useful for comparing free-spin wheels, high-Hz encoders, or a mouse that feels sluggish after a driver update.
How to test the scroll wheel
Thirty seconds of up/down scrolling on the pad is enough to flag most wheel faults.
-
Hover and scroll both ways
Place the cursor on the pad and roll ten ticks up, then ten down. Direction and the diagram should respond every time.
Lift the mouse slightly between directions if your desk mat catches the wheel.
-
Read average and graph
Average px per tick should stay stable for the same mouse and OS settings. The bar graph plots recent step sizes — look for missing bars or alternating huge/small spikes.
Reset and retest after cleaning the wheel with compressed air.
Tips for reliable scroll tests
-
Disable browser extensions that remap scroll — they can swallow or alter wheel events.
-
Test on a plain page tab; heavy 3D sites may coalesce scroll for performance.
-
Wireless mice: retest on a fresh battery when ticks drop out mid-scroll.
-
Screenshot the graph before RMA — vendors often ask for proof of encoder skips.
Mouse scroll & scroll speed test FAQs
What is a scroll speed test?
A scroll speed test measures how fast your mouse wheel reports events — usually as ticks per second while you spin the wheel. This page shows live ticks/sec plus average px per tick so you can benchmark scroll speed and spot skipped or uneven steps, not just whether scrolling works at all.
How do I test my mouse scroll wheel online?
Open this page, hover the scroll pad, and roll the wheel up and down. Direction, average px per tick, tick count, and ticks per second update live. The animated mouse diagram highlights the wheel and scroll arrows on each tick — no download required.
How to test if mouse scroll is working?
Scroll both directions on the pad. Direction should flip with each way you roll and the tick counter should climb steadily. If direction never changes or ticks stay at zero, the encoder or driver may be failing.
What is a scroll test?
A scroll test checks whether the mouse wheel sends consistent wheel events to the PC. This browser test reads WheelEvent delta values — typical desktop notches land around 40–120 px depending on OS, browser, and mouse firmware.
What is average px per tick?
Average px per tick is the mean absolute wheel delta across all ticks in this session. Smooth, fine-step wheels tend to stay lower and steadier; notched wheels show higher averages. Wild swings in the graph suggest hardware or driver issues.
Can I test horizontal scroll here?
This pad focuses on vertical wheel ticks — the most common scroll wheel test. Shift+scroll or a tilt wheel may appear as horizontal delta in some browsers; for dedicated horizontal scroll testing, use a page with horizontal overflow.
Why does my scroll feel fast or slow but delta looks normal?
OS scroll speed, browser smooth scrolling, and trackpad vs mouse settings change perceived speed without changing raw wheel delta. Compare the same mouse on this test vs in vendor software to isolate hardware from software acceleration.
Does this measure scroll speed records?
The ticks-per-second readout shows how fast you are spinning the wheel in a one-second window — fun for benchmarking, but not an official record. Focus on consistent delta and clean up/down counts for hardware diagnosis.
What is a scroll click test?
A scroll click test checks whether pressing the wheel (middle click) registers separately from scroll wheel events. Scrolling sends WheelEvent deltas; a firm wheel press should fire a middle-button click on our mouse test center. If the wheel scrolls when you meant to middle-click — or middle-clicks when you only scroll — the switch stack may be worn.
How to scroll click?
Scroll click usually means pressing the wheel down for middle click (open links in new tabs, pan in CAD, etc.) — not spinning the wheel. Press firmly on the wheel without rotating; the middle button should register on our mouse test page. Some gaming mice also support tilt-wheel horizontal scroll — that may appear as horizontal delta here, but vertical scroll testing is this page's focus.
Middle click vs scroll — what's the difference?
Scrolling fires wheel events with delta values. Pressing the wheel fires a middle button (button 1) event. Use our mouse test center to verify middle click separately if the wheel feels loose or clicks when you only meant to scroll.
