Measure a known physical mouse travel distance and corresponding on-screen pointer pixels. The result is an effective setup estimate, not a direct sensor CPI readout.
Measure browser-visible pointer movement over a known physical mouse distance instead of manually entering a pixel count. This is an effective browser measurement, not raw sensor CPI.
For repeatability, use a longer measured sweep and repeat in both directions.
Bridge the measured effective DPI to game sensitivity while keeping the sensor-CPI boundary explicit.
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These pages can report Web API data such as events, stream settings, frame timing and audio samples. They do not certify hardware condition or bypass browser and operating-system limits.
The calculation is CSS-pointer-pixels per measured inch, with a DPR-based device-pixel equivalent shown only as an estimate. OS acceleration and raw-input game paths can differ materially.
Use the interactive product above first. These notes add interpretation, verification and limits below the results and product controls.
A one-inch or several-centimeter sweep reduces the relative effect of a one-pixel reading error. Mark the start and end points on the desk or mouse pad, then move in a straight line without lifting the mouse.
Operating-system acceleration, pointer scaling, browser CSS pixels and display scaling can all sit between the sensor and this page. Treat the measured value as effective browser movement unless you have independently disabled or characterized those layers.
Run several left-to-right and right-to-left passes over the same physical distance. A stable setup should cluster reasonably tightly; a large spread suggests acceleration, inconsistent endpoints, surface tracking or measurement error.
DPI multiplied by an in-game sensitivity value is useful only within games or engines whose sensitivity scales are comparable. Do not compare raw eDPI across unrelated games unless a yaw or rotation model is included.
When the game yaw model is known, centimeters per full turn is often easier to compare across DPI settings than a sensitivity number alone. Re-check the in-game rotation with a measured mouse sweep before relying on the calculated target.
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