What the numbers mean
| Double-click gap | Milliseconds between your two clicks. Windows accepts up to 500 ms by default; macOS similar. If you click once and the counter jumps by two with a gap under 80 ms, the switch is worn and “double-clicking” on its own. |
| Polling rate | How many position updates per second the mouse sends while moving: 125 Hz office mice, 500–1000 Hz gaming mice, 2000–8000 Hz on some. Browsers may coalesce events, so treat it as a lower bound. |
| Scroll | Each wheel notch should change the count by the same amount. Skipping or reversing means a dirty or failing encoder. |
Buttons that don’t register
- Back/Forward exist only on mice with side buttons; some gaming software remaps them so the browser never sees them.
- Middle click on a touchpad usually needs a three-finger tap setting.
- If left never registers, check the mouse is not in a “swapped buttons” mode (Windows: Settings › Bluetooth & devices › Mouse › Primary button).
Related tests
Keyboard testEvery key, rollover, stuck keysTouch screen testDead zones, multi-touch, ghost touchGamepad testButtons, sticks, drift %, vibration
Questions, answered
My mouse double-clicks when I click once.
A worn micro-switch. Some makers replace under warranty; otherwise a repair shop can swap the switch in minutes. Until then, Windows users can raise the double-click speed to make it less sensitive.
Polling shows only 60 Hz.
The browser is limiting pointer events to the display refresh rate. Chrome exposes raw rates better than Safari; the mouse itself may still be 1000 Hz.