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Mouse DPI Test
Lock the pointer, move a marked distance, then click. The estimate is counts divided by inches.
Press start, move the mouse that distance in a straight line, then click. Desktop Chrome or Edge is the steadiest.
Counts
0
DPI
—
Nearest common
—
Waiting to lock the pointer.
More tests
What it measures
Counts
How far the pointer reports moving while the cursor is locked.
DPI
Those counts divided by the distance you say you moved, in inches.
Questions
How do I run it?
Press start, move the mouse a ruler length, then click. Pick 2.54 cm for one inch or a longer marked distance.
Why would the number be off?
Windows pointer acceleration and a browser that ignores raw movement both change the count. Chrome or Edge on a desktop give the steadiest result.