The precision diagnostics platform for your mouse.

To test mouse latency (click delay and sensor response), use our Switch Chatter & Double Click Test and Polling Rate Test. Mouse latency includes switch debounce time (typically 2ms–12ms on mechanical switches, ~0.2ms on optical switches), USB polling interval (1ms at 1000Hz down to 0.125ms at 8000Hz), and system display lag. Our tools measure your click actuation intervals down to fractional milliseconds and verify real-time packet delivery frequency without display throttling.

To test mouse buttons, open our Mouse Button Test Lab. Click your Left button (Button 1), Right button (Button 2), Middle wheel button (Button 3), Browser Back (Button 4), Browser Forward (Button 5), and any additional side macro buttons (supporting up to 9 buttons). The interactive visual chassis illuminates registered clicks in real time, logs chord clicks (holding multiple buttons simultaneously), and records actuation duration in milliseconds.

Polling rate on a mouse refers to how many times per second the mouse reports its positional coordinates and click states to your computer, measured in Hertz (Hz). A standard office mouse reports at 125Hz (every 8ms), standard gaming mice report at 1000Hz (every 1ms), and high-end esports mice report at 2000Hz, 4000Hz, or 8000Hz (down to 0.125ms). A higher polling rate delivers smoother cursor tracking and reduced input lag.

DPI on a mouse stands for 'Dots Per Inch' (technically CPI, or Counts Per Inch). It indicates physical sensor sensitivity—specifically, the number of pixels your cursor moves on screen for every one physical inch you move your mouse across your desk or mousepad. At 800 DPI, moving your mouse one inch moves your cursor 800 pixels on screen.

To check mouse DPI, use our interactive Mouse DPI Test. Enter your nominal DPI setting, choose a known physical distance (such as 3 inches, 10 cm, or a 3.37-inch standard credit card), align your mouse with a straight edge, and drag the on-screen ball for that exact physical distance. The tool counts raw sensor signals and reveals your true hardware DPI and percentage deviation.

You can change mouse DPI through: 1) The physical DPI button located behind the scroll wheel or on the underside of the mouse shell; 2) Your mouse manufacturer software (such as Razer Synapse, Logitech G HUB, Pulsar Fusion, or Zowie hardware switches); or 3) Windows mouse settings by adjusting the pointer speed slider (tick 6/11 is recommended for 1:1 raw scaling without pixel skipping).

On a mouse, DPI means the tracking resolution of the optical sensor. Higher DPI (such as 1600 or 3200 DPI) moves the cursor faster across the monitor with minimal physical hand movement, which is convenient for multi-monitor and 4K setups. Lower DPI (such as 400 or 800 DPI) requires larger arm motions, giving competitive FPS players greater control for micro-aim adjustments.

The mouse test on MouseTests.com is a free, comprehensive online diagnostic suite designed to evaluate your pointing hardware directly in your web browser. It tests all mouse buttons (1–9), detects double-clicking microswitch chatter, measures polling rates up to 8000Hz via coalesced events, isolates scroll wheel reverse-jumps, calibrates true sensor DPI, and benchmarks click speed (CPS) without requiring driver or software installations.

To test if your mouse is good: 1) Run the Button Test to confirm left, right, middle, and side buttons actuate cleanly; 2) Run the Double Click Test across 50–100 clicks to ensure there is zero contact bounce chatter; 3) Check the Polling Rate Test to confirm steady Hz without dropped packets; 4) Spin the wheel on the Scroll Test to detect reverse-jumps; and 5) Test DPI accuracy to ensure sensor deviation is under 5%.

If your mouse is not working: 1) Check physical connections, try a different direct motherboard USB port, or replace/recharge the battery; 2) Verify whether the optical sensor LED/laser on the bottom is lit; 3) Test on another computer to isolate hardware failure from Windows software issues; 4) Check Device Manager under 'Mice and other pointing devices' for driver warning icons; or 5) Run our interactive Mouse Doctor troubleshooter for guided repair steps.

Signs that your mouse is failing include: 1) Unintended double clicks when clicking once (microswitch leaf spring contact chatter); 2) Scroll wheel reverse-jumps (scrolling down randomly jumps upward due to encoder wear); 3) Sudden cursor freezes or spinouts during fast flicks (sensor failure); 4) Windows USB disconnect/reconnect chime when wiggling the cable (internal cable fracture); and 5) Sticking or mushy button clicks.

To test mouse click speed, visit our CPS Mouse Test (Clicks Per Second). Select a test duration (such as 1, 5, 10, or 30 seconds), position your fingers, and click as fast as you can. The test tracks your average CPS, peak speed, click consistency, and detects techniques such as jitter clicking, butterfly clicking, and drag clicking.

To fix common mouse issues: For double-clicking, increase the debounce time in your mouse software, or blow compressed air / electrical contact cleaner into the switch. For scroll jumping, roll the wheel upside down against your desk for 30 seconds to dislodge dust from encoder teeth. For sensor skipping, clean the lens aperture with a dry Q-tip cotton swab. If physical hardware is permanently defective, use our Mouse Doctor to generate an official RMA warranty replacement certificate.

Mouse problems stem from: 1) Mechanical fatigue—switches and scroll wheels have moving parts that wear out after tens of millions of actuations; 2) Environmental contaminants—dust, lint, dead skin, and sweat oxidize copper contacts and obstruct optical sensor lenses; 3) Electrical issues—static electricity buildup, cable strain relief fractures, or low battery voltage; and 4) Driver/firmware misconfigurations such as overly aggressive debounce filters or USB port power saving.

You can test your mouse right in your web browser on MouseTests.com. Simply navigate to our test tabs to test your buttons, measure your click latency, check for double clicking, verify polling frequency (up to 8000Hz), inspect scroll wheel stability, test sensor tracking smoothness, and calculate your true DPI against rated specs—100% free with zero downloads.

You can test the DPI of your mouse by gliding your mouse a physically measured distance across your mousepad using our True Hardware DPI Calibrator. The tool calculates: True DPI = Recorded Counts / Distance in Inches. This eliminates manufacturer labeling errors caused by mouse skate thickness, lens focal distance, or mousepad foam compression.

If your PC is not detecting your mouse: 1) Plug directly into a rear motherboard USB port rather than an unpowered USB hub; 2) Open Device Manager (Win + X), expand 'Mice and other pointing devices', right-click and uninstall the mouse, then replug to force Windows to reinstall clean drivers; 3) Disable 'USB Selective Suspend' in Windows Power Options; and 4) If wireless, re-pair the mouse to its USB dongle using the manufacturer pairing utility.

You can test mouse speed in two ways: 1) Cursor tracking velocity (measured in pixels per second) on our Overview quick-lab or Sensor Test, which graphs acceleration and movement speed; and 2) Click rate speed using our CPS Mouse Test, which benchmarks your clicks per second across customizable time intervals.

Mouse lag or cursor stuttering is typically caused by: 1) 2.4GHz wireless interference from nearby USB 3.0 ports or Wi-Fi routers (use a USB extension dock to bring your receiver within 20cm of your mousepad); 2) High polling rates (4000Hz/8000Hz) overloading a mid-range CPU; 3) Dirt, hair, or lint trapped in the optical sensor lens; 4) A reflective or uneven desk surface; or 5) Windows 'Enhance Pointer Precision' introducing non-linear cursor acceleration.

A normal mouse speed depends on your monitor resolution and use case. For standard 1080p desktop productivity, 800 to 1200 DPI is standard and comfortable. For 1440p and 4K displays, 1600 to 2400 DPI is widely used. In competitive gaming (CS2, Valorant, Apex Legends), professional esports players predominantly use 400 or 800 DPI combined with low in-game sensitivity for consistent muscle memory.