Mouse DPI Test

DPI stands for Dots Per Inch - it measures how many pixels your cursor moves on screen for every inch the mouse travels on your desk. A mouse set to 800 DPI will move the cursor 800 pixels for every inch of physical movement. Higher DPI means faster cursor movement for the same physical distance. Modern gaming mice typically range from 400 to 25,600 DPI, though most professional gamers use settings between 400 and 1600 DPI. Many mice also call this CPI (Counts Per Inch), which is technically more accurate.

Most professional FPS gamers use 400-1600 DPI paired with a low in-game sensitivity to achieve precise control. The popular choice in competitive gaming is 400 or 800 DPI. High DPI (3200+) is more common in MOBA or RTS games where fast cursor movement across the screen is needed. The optimal DPI depends on your monitor resolution, physical sensitivity, and game genre. A common formula is: effective DPI (eDPI) = hardware DPI × in-game sensitivity - and most pros maintain an eDPI between 200 and 1600.

DPI is a hardware setting that controls the raw polling sensitivity of the mouse sensor. In-game sensitivity is a software multiplier applied on top. Both affect how fast your cursor moves, but they are distinct. DPI is more precise because it is processed at the hardware level before the OS applies any acceleration. Changing DPI on the mouse itself is generally preferred over increasing in-game sensitivity, as the latter can introduce sub-pixel rounding errors. The combination of both is called eDPI (effective DPI).

Mouse acceleration (called "Enhance Pointer Precision" in Windows) adjusts cursor speed based on how fast you move the mouse - faster physical movement results in disproportionately more cursor movement. This breaks muscle memory because the same physical movement produces different cursor displacement depending on speed. For gaming and DPI testing, disable it: go to Control Panel - Mouse - Pointer Options - uncheck "Enhance Pointer Precision." macOS has a separate acceleration curve that can be disabled with third-party tools like LinearMouse.

eDPI (effective DPI) = Hardware DPI × In-Game Sensitivity. For example, if your mouse is set to 800 DPI and your in-game sensitivity is 2.0, your eDPI is 1600. This metric is useful for comparing sensitivities across different games and players since it normalizes the hardware DPI variable. Professional CS2 players typically have an eDPI between 400 and 1600. For Valorant, common pro eDPI is 200-400 (the game uses lower sensitivity values). You can use the DPI calculator on this page to first measure your actual hardware DPI, then multiply by your game sensitivity.

There are several reasons for discrepancy: (1) Mouse acceleration - if "Enhance Pointer Precision" is enabled in Windows, cursor movement is non-linear, skewing the measurement. Always disable it before testing. (2) OS pointer scaling - Windows applies a separate speed multiplier on top of DPI, which you can check in Mouse Settings - Additional mouse options - Pointer Options - Motion. Set the slider to the middle "6/11" notch for accurate readings. (3) Physical measurement error - the accuracy of this test depends on how precisely you measure the physical mouse distance. Use a ruler for best results.

At the same in-game sensitivity, 800 DPI moves the cursor twice as fast as 400 DPI. Many pros use 400 DPI with a 2× in-game sensitivity instead of 800 DPI - they are mathematically equal in eDPI, but 400 DPI reduces the chance of sub-pixel rounding in older game engines. Modern game engines handle both identically, so the choice is largely personal preference.

Not necessarily. Higher DPI increases cursor speed but not inherently accuracy. Most high-precision sensors perform optimally in the 800-3200 DPI range. Running a sensor at its maximum DPI (e.g., 25,600) often introduces jitter. For competitive accuracy, choose a DPI where you can make precise adjustments without feeling restricted - typically 400-1600 for FPS games.

The test works technically, but results are unreliable for trackpads. Laptop trackpads use a different sensing technology and their 'DPI' is controlled entirely by the OS driver - there is no hardware DPI to measure. This tool is designed for optical/laser mice. For trackpad sensitivity tuning, use your OS accessibility or trackpad settings instead.