Calibrate the on-screen ruler with a real ruler, then move the mouse straight by the selected physical distance. The result is an estimated DPI value.
The browser cannot read the mouse hardware DPI setting. Windows scaling, pointer acceleration and physical measurement error can affect the estimate.
Tests mostly run in your browser. Microphone/camera data is not saved on the server.
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How to use and interpret Mouse DPI Estimate
What this test checks
Estimates DPI by comparing cursor movement with a physical distance you calibrate.
Estimate mouse DPI with a calibrated physical movement distance in the browser.
How to interpret the result
Look for missed, repeated or unexpected input events and compare the behavior with another browser or device when possible.
Browser limitations
Browser focus, operating-system shortcuts, accessibility features, wireless interference and device firmware can affect input behavior.
Frequently asked questions
What does Mouse DPI Estimate check?
Estimates DPI by comparing cursor movement with a physical distance you calibrate.
Does a failed input mean the keyboard or mouse is broken?
Not necessarily. Re-test after checking focus, connection, batteries, another USB port or another browser before treating it as a hardware fault.
What should I do if the result looks bad?
Repeat the test under the same conditions, check the suggested next diagnostic and compare with another browser, connection or device where practical. Use the related guides for step-by-step troubleshooting.