Mouse DPI & Sensitivity Calibrator
Calculate your mouse sensor's true hardware DPI against physical desk distance (cm/inches).
Place mouse at starting mark on ruler, press & hold left button, slide across chosen distance, then release.
Sensor Calibration & Deviation
Why Does Real DPI Differ from Mouse Software?
Mouse sensors (PixArt 3395, 3370, Focus Pro 30K, HERO 2) are high-speed microscopic optical cameras that track surface weave imperfections. Minor physical differences in skate thickness, mousepad texture, and lens manufacturing tolerances create real-world DPI deviation typically between ±1% and ±5%.
How to Test Your Mouse Click Sensitivity & CPI
Curious how to test your mouse click sensitivity accuracy? Place a physical desk ruler alongside your mousepad. Select your target distance (1 inch, 2 inches, or 5 cm), press down on the pad, slide steadily across the exact distance, and release to calculate true hardware CPI.
Accurate Esports cm/360° Conversion
For competitive gamers transferring muscle memory between mice, knowing real CPI is crucial. If your old mouse was 800 DPI +3% (824 DPI) and your new mouse is 800 DPI -4% (768 DPI), your in-game turning arc will feel noticeably sluggish without mathematical calibration.
Free Sensor Benchmark on Our Mouse Click Test Website
This calibrator on our mouse click test website samples unadjusted raw pixel coordinates directly via pointer events. It operates without drivers, making it accessible on any Windows, macOS, ChromeOS, or Linux system.
Complete Hardware Mouse Test
Run a complete mouse test by pairing DPI calibration with our Polling Rate, Double Click, and Hold Continuity tools to evaluate sensor fidelity, switch health, and cable integrity in one place.