This double click test finds a mouse button that sends two clicks when you press it once. Click each button at your normal pace and the test times the gap between letting go and pressing again. A finger cannot release a button and press it again in a few milliseconds, so any press that comes sooner than the limit you set, 80 ms by default, is flagged as an unwanted double click. It checks the left, right, middle, back and forward buttons on any wired, wireless or Bluetooth mouse on Windows, Mac, ChromeOS and Linux, and keeps back and forward from leaving the page while the pointer is on the test.
How to run the double click test
- Put the pointer on the click area. Back and forward will not leave the page while it is there.
- Click the left button about 20 times, one single click at a time, at the speed you normally click.
- Hold the button down for a second or two, as if you were dragging a file, then let go. Do this three or four times.
- Repeat for the right button, the wheel and the two side buttons.
- Read the table. Doubles counts presses that came too soon after a release, and Shortest gap shows the quickest one.
- Press Copy results to paste a report into a support ticket or warranty claim.
Do not double click on purpose during the test. A quick deliberate double click can leave less than 80 ms between letting go and pressing again, which looks like a fault.
What the results mean
| Readout | What it tells you | Healthy result |
|---|---|---|
| Presses | Clicks the browser received from that button | The number of times you pressed it |
| Doubles | Presses that started less than the limit after letting go | 0 |
| Shortest gap | The quickest release to press time on that button | Above 150 ms when clicking normally |
| Gap chart | How the gaps spread out across all buttons | All bars at 150 ms and above |
| System double click window | How far apart two left clicks can be and still count as a double click | About 500 ms on a default Windows setup |
A switch that bounces usually leaves gaps under 20 ms, far shorter than any finger can manage. If a button shows doubles with gaps of 30 to 80 ms, click it more slowly and see whether they go away. If they stay, raise or lower the limit with the slider to see which presses are borderline.
A single click registers as a double click
When a button shows doubles with gaps of a few milliseconds, the switch inside is bouncing. Each click closes two metal contacts, and a worn or dirty contact chatters as it opens or closes. The mouse reads the chatter as a second click. These are the causes from the most to the least likely:
- A worn switch. Mouse switches are rated for millions of clicks, but the springy metal leaf inside loses tension with use. Gamers and heavy users often reach that point within a couple of years.
- Oxidised or dirty contacts. A thin film on the contacts makes the connection unreliable, which is common in older switches and in damp rooms.
- Dust or crumbs under the button. Grit can hold the button half pressed, so it makes and breaks contact as you click.
- A weak battery in a wireless mouse. Low power can make clicks erratic. Replace or charge it before you blame the switch.
The guide for mouse double clicking walks through every fix in order, from cleaning to replacing the switch.
Why so many Omron switches double click
Many gaming and office mice made in the last decade use small Omron micro switches, such as the D2FC-F-7N, rated for 10 or 20 million clicks. They have a reputation for double clicking well before that. One common explanation is that mice run the switch at a very low current, too little to burn off the oxide film that builds up on the contacts, so the contact gets less reliable over time. Whatever the reason, the pattern is the same: the left button starts double clicking now and then, and it gets worse.
Mice with optical switches, which detect the click with a beam of light instead of metal contacts, do not suffer from this kind of bounce. That is one reason many recent gaming mice use them.
The static discharge trick
A widely shared fix is worth two minutes before you open anything. Unplug the mouse, or switch it off and take out the battery. Click each button quickly 20 or 30 times, then leave the mouse unplugged for a minute and connect it again. Some people find it stops double clicking for days or weeks. It is more likely that the repeated clicking wipes the contacts than that any charge is drained, so it rarely lasts. If doubles come back in this test, plan a lasting fix.
The button lets go while you hold it
If the result says a button let go by itself while held, the switch is opening for a moment during a long press. In daily use that drops files halfway through a drag, ends a text selection early or breaks a held fire button in games. The cause is the same worn contact, so the same fixes apply. Test it by holding the button for a few seconds at a time.
Double clicking that is really a setting
Some double click complaints are not a fault at all:
- Files open with one click. In File Explorer, open the menu with three dots, then Options, and on the General tab choose Double-click to open an item.
- Double clicks are not recognised. The double click speed is set too fast. In Windows 11 go to Settings, Bluetooth & devices, Mouse, Additional mouse settings, then the Buttons tab. On a Mac, open System Settings, Accessibility, Pointer Control and set Double-click speed. The readout above shows where your system draws the line.
- A button acts as if it is held. ClickLock, on the same Buttons tab in Windows, locks a button after a long press. Turn it off.
- Mouse software. Logitech G HUB, Razer Synapse and similar apps can assign a double click or a macro to a button. Check the button assignments.
Lasting fixes: debounce, a new switch or a new mouse
Some gaming mice have a debounce setting in their software. The mouse ignores a second contact change for that many milliseconds, which hides light chatter at the cost of a little delay. Raise it a step at a time and test again here.
If the mouse is out of warranty and you can solder, replacing the switch costs a few dollars. Most mouse buttons use the same three pin micro switch, so a replacement such as an Omron D2FC-F-K (50M) or a Kailh GM 8.0 fits most mice. Remove the screws, often hidden under the feet, desolder the old switch, fit the new one and check every button here before you close the case. Optical and hybrid switches cannot be swapped this way.
If the mouse is still covered, claim the warranty instead, since opening it can end the cover. Paste the copied report, which lists each button, its presses and the gaps that were flagged, into the claim form.
Other mouse checks
To see every button, the wheel and side buttons light up together, use the mouse button test, and for the wheel press on its own the middle click test. A switch that double clicks also inflates speed scores, so the click test warns when clicks arrive faster than one finger can make them. For keys that type twice, the keyboard tester runs the same kind of check on a keyboard.
What this test cannot see
The test reads what the mouse sends to the browser. Most mice filter out very short bounces in their own firmware, so a switch can be slightly worn and still pass. A fault that shows up once an hour may not appear in a short test, so test again when you notice it in normal use. The test cannot tell a switch fault from a mouse that sends a double click on purpose through its software, which is why checking the button settings matters.
Double click test questions
How do I know if my mouse is double clicking?
Click one button at your normal pace for about a minute. A working mouse never sends a second press within a few milliseconds of letting go, so any click this test flags in orange is the switch bouncing, not your finger. A worn or dirty switch is almost always the cause, and it usually starts on the left button because it does the most work.
How many clicks does the double click test need?
About 20 single clicks per button at your normal pace, plus a few long holds. A badly worn switch shows up in the first few clicks. A switch that fails now and then may need 50 or more, so test again later if you still see the problem in normal use.
Can a double clicking mouse be fixed?
Sometimes for a while. Cleaning the switch with compressed air, the unplug and click trick, or raising the debounce time in the mouse software can stop it. A lasting fix is a replacement switch, a warranty claim or a new mouse.
Is a double clicking mouse covered by warranty?
Usually yes, if it is still inside the warranty period, since a switch that double clicks is a hardware defect. Copy the results from this test and include them with your claim, along with the date you bought the mouse.
How do I change the double click speed in Windows?
In Windows 11, open Settings, then Bluetooth and devices, then Mouse, then Additional mouse settings. On the Buttons tab, move the Double-click speed slider. You can also press Windows key + R and type main.cpl. The default is 500 ms.
Does this test work on a Mac or Chromebook?
Yes. It reads the mouse buttons through the browser on Windows, Mac, ChromeOS and Linux. Browsers differ in how they report extra buttons, so if the side buttons show nothing in Safari, try them in Chrome, Edge or Firefox.