Mouse DPI Checker
Free · No installEstimate mouse DPI with a physical ruler. Three passes help you check repeatability.
A mouse needs a computer.
Open this page on a computer and connect your mouse to test it. You can copy the link below.
A connected mouse on a touchscreen device can also work. Touch taps cannot test physical mouse buttons.
- Mark a desk distance. Mark 2 inches (5.08 cm) on your desk with a ruler. Track one point on your mouse.
- Left click to start. Put the pointer in the dark area, then lift the mouse to your desk start mark. Left click and wait for the pointer to hide.
- Right click to finish. Move straight to the end mark without lifting or reversing. Right click. Lift back and repeat for 3 passes.
Desk distance, not screen distance.
Pass 1 of 3: left click this area to start at your desk mark. Move to the end mark, then right click to finish.
Mouse only: left click the dark area to start; right click to finish. Optional keyboard: Space starts with the area or Start focused; Enter finishes. Esc discards only the unfinished pass.
Estimated mouse DPI, never a direct hardware read. Raw movement must be supported; no cursor-pixel fallback.
Back/Forward mouse events and delivered navigation shortcuts are blocked while a test is active. A driver command that never reaches this page may still navigate; use standard side-button assignments in your mouse software for this test.
Your result
Browser observations only. Compare another port or computer before concluding there is a hardware fault.
How to read your mouse DPI estimate
This mouse DPI checker estimates horizontal raw movement per physical inch. Mark a distance on your desk with a real ruler, keep the same point on the mouse aligned with those marks, and move horizontally without lifting or reversing. The result is the median of three valid passes. The consistency score is 100 minus the percentage spread between the lowest and highest estimate, capped at zero. Excellent means a spread of at most 5%; Normal allows up to 15%. These are repeatability bands for this tool, not universal mouse DPI tolerances. A higher mouse DPI is not better or worse hardware. A consistent estimate can still be inaccurate if you measured the desk distance incorrectly or the browser or driver scales the movement. Compare with the manufacturer’s setting when available. Ordinary cursor movement and a screen ruler cannot establish hardware mouse DPI, so unsupported raw-input browsers receive an explanation instead of a substitute number.
What to do if something looks wrong
- Recheck the physical distance on the desk. Use at least one inch; two inches or 5.08 cm makes small measurement errors less significant.
- Keep the same mouse DPI setting, profile, surface and direction for all three passes. Do not lift the mouse during a pass.
- Use an up-to-date desktop browser. If raw input is unavailable or denied, use the manufacturer’s app to read its configured mouse DPI.
- If estimates vary, try a clean, consistent mouse pad and check the sensor for dust while the mouse is disconnected.
- Compare another computer and the manufacturer’s mouse DPI setting before concluding that tracking behavior comes from a sensor issue.
Related mouse tests
Frequently asked questions
Can a website read my hardware mouse DPI?
This site cannot read the mouse firmware setting. It estimates mouse DPI from unadjusted browser movement over a distance you measure with a physical ruler. The estimate remains subject to technique, driver and browser limitations.
Do I measure on the screen or on my desk?
Measure on the desk or mouse pad. Mark the distance and track the same physical point on your mouse. Put the pointer in the dark area, lift the mouse to the start mark, left click to start, move straight, then right click to finish. Lift back and repeat three times. A screen ruler does not calibrate the mouse sensor.
Why does the mouse DPI checker hide my pointer?
Raw pointer lock removes the screen edge limit and requests movement without operating-system acceleration. Right click to finish a pass and release the pointer. Optional keyboard controls: Space starts when the area or Start is focused, Enter finishes, and Escape releases the pointer and discards the unfinished pass.
What if raw mouse movement is not supported?
The tool stops and explains the limitation. It does not silently replace raw movement with cursor pixels. Try an updated desktop browser, or inspect the configured mouse DPI in the manufacturer’s software.
Does a high mouse DPI or a low consistency score mean damage?
No. Mouse DPI is a sensitivity setting, not a health grade. A low consistency score tells you to repeat the measurement; physical distance errors, inconsistent technique, surfaces and settings can all change the estimate.
Sources and test limits
Methods are browser observations, not hardware certification. See the scoring formulas and limitations.
Return to Mouse Test to start another check.