DPI Analyzer
Move the mouse a known distance along a ruler. The page counts the dots.
Move the mouse straight along your ruler for the distance you entered, then click to finish.
Ready.
Every test runs inside your browser. Nothing you type, say, show or press is uploaded.
How to use this test
The DPI analyzer measures your mouse's real sensitivity in dots per inch. You move the mouse a known distance, the page counts the movement units the mouse reports and divides one by the other. Compare the result with the DPI set in your mouse software to see how accurate the sensor is.
Put a ruler on your desk, or use a bank card, which is 85.60 mm wide. Enter the distance, and the DPI from your mouse software if you know it. Point at Start, then lift the mouse and set it down with its edge on the start mark. Click Start, slide the mouse smoothly to the end mark, keeping it straight, and click to finish. Do three runs and use the average.
What the results mean
A measured DPI within a few percent of the setting is normal, because sensors and surfaces vary. A bigger gap usually means pointer acceleration was applied (check the raw movement readout), the mouse moved at an angle, or the setting isn't what you think. Trust the average of three runs, not a single one.
Common questions
What does raw movement mean?
When the browser allows it, the page reads mouse movement before your operating system applies pointer acceleration. Without it, the result can change with how fast you move. Slide the mouse slowly and evenly to keep that effect small.
Why is my measured DPI lower than the setting?
Usually the mouse moved at an angle, lifted off the desk or stopped short of the mark. A small shortfall of a few percent is also normal for many sensors.
What DPI should I use?
There's no right number. Pick a DPI that feels comfortable and fine-tune the sensitivity in each game. What matters is that your DPI is consistent, which is what this test checks.