How to use
- Move the mouse over the test area and press the left, right and middle buttons and both side buttons. Each counter should go up.
- Press each button slowly, one click at a time. A possible double-click means that button may be faulty.
- Scroll up and then down for a while and check the opposite direction's counter does not go up too (a jumping wheel).
Options explained
- Possible double-clicks
- Two presses of the same button closer together than the chosen threshold (80 ms by default). A deliberate double-click is usually over 100 ms apart; a worn switch bounces within a few to a few tens of milliseconds.
- Shortest gap
- The shortest time seen between two presses of that button. Read it together with the double-click count.
- Wheel
- Counts scrolling up, down, left and right (a tilting wheel or sideways scroll) separately. The latest direction is highlighted.
Button numbers and the double-click rule
Browsers number mouse buttons the same way on every system. The test area counts each one separately:
| Button number | Button shown in the test |
|---|---|
| 0 | Left |
| 1 | Middle (wheel) |
| 2 | Right |
| 3 | Back (side) |
| 4 | Forward (side) |
A press is flagged as a possible double-click when the gap since the previous press of the same button is shorter than the threshold set in Flag presses closer than. Different buttons never affect each other. With the default of 80 ms, two presses 45 ms apart are flagged and two presses 150 ms apart are not. Gaps of a few milliseconds almost always come from a worn switch rather than from your finger, so repeat the test a few times and see whether the Shortest gap stays that low.
Frequently asked questions
What causes a mouse to double-click?
The small switch under each button wears or oxidises, so one press sends two signals. You see single clicks turning into double-clicks and drags letting go halfway.
Which threshold should I use?
80 ms suits most people. A fast deliberate double-click can come close to 100 ms, so click slowly while testing. Regular gaps of a few tens of milliseconds almost certainly mean the button is double-clicking.
Will the side buttons make the page go back?
Not inside the test area. Back, forward and the right-click menu are blocked there; outside it the browser behaves as usual.
How is this different from the click speed test?
The click speed test measures how fast you can click (CPS). The mouse test checks whether each button, side button and the wheel works, especially for double-click faults.
Privacy
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