How the scroll speed test works
- Pick a length: 5, 10 or 30 seconds.
- Spin the wheel inside the box. The timer starts on the first tick.
- Your score is wheel ticks per second, with total ticks, distance and a speed graph.
What counts as a tick?
Every wheel event your browser receives is one tick. On a notched wheel that is roughly one per step you feel. Touchpads, free-spinning wheels and smooth-scrolling software send many more, so only compare results from the same mouse and settings.
Check your scroll wheel
Scroll slowly in one direction and watch the Up and Down counters. If the wrong one goes up now and then, the wheel encoder is dirty or worn. Compressed air around the wheel often helps.