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Mouse DPI Test

This mouse DPI test measures real DPI from a known distance. Set a target distance, hold the left button inside the box, move the mouse exactly that far in a straight line and release. Repeat a few times and trust the average.

Measurement area

Hold, move the target distance, release

0 counts

Hold the left button inside the box and move the mouse exactly the target distance.

Measured DPI

Last run
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Average
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Difference from configured
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    Live mouse

    Measure DPI with a ruler and this page

    1. 1. Turn off acceleration

      Set Windows pointer speed to the middle notch (6/11) and untick Enhance pointer precision, or disable acceleration on macOS. Otherwise counts are scaled.

    2. 2. Lay a ruler beside the mouse

      Line the mouse edge up with the zero mark. Hold the left button inside the box, move exactly 10 cm along the ruler, release.

    3. 3. Repeat and average

      Do it three to five times. Small hand errors cancel out, and the average is usually within 2 percent of the true DPI.

    How this DPI checker works

    Raw movement counts

    The tool sums horizontal movement reports while you hold, scaled by your display's pixel ratio.

    Both units

    Enter the distance in centimetres or inches; the maths is handled for you.

    Difference readout

    Compare the measured value with what your software claims and spot a mouse that lies.

    Run history

    Keep the last eight runs on screen to see whether your measurements are consistent.

    DPI and sensor terms

    DPI / CPI
    Counts the sensor reports per inch of movement. 800 DPI means 800 counts for one inch.
    Pointer acceleration
    An operating system feature that scales movement by speed. It breaks DPI measurement and most gamers disable it.
    Native DPI
    Sensor steps where no interpolation happens, often multiples of 400 or 800. Usually the most accurate choice.
    DPI deviation
    The percentage difference between advertised and real DPI. Up to 5 percent is normal; more suggests a poor sensor or wrong setting.

    DPI test questions

    My measured DPI is about double. Why?

    Pointer acceleration or a pointer speed above the middle notch doubles counts. Reset both and measure again.

    Does screen resolution matter?

    No, the tool corrects for pixel density. Only your OS pointer speed and acceleration affect it.

    What DPI should I use?

    Most players use 400 to 1600 and adjust sensitivity in game. Higher DPI with lower in-game sensitivity reduces pixel skipping.

    Can I measure a trackpad?

    Trackpads report in a different way, so the number is not comparable to a mouse DPI.

    Fix an inaccurate measurement

    Readings vary wildly

    Move more slowly and in a straight line. Diagonal movement only counts the horizontal part.

    Measured DPI far above setting

    Pointer speed or acceleration is on. Set 6/11 and disable enhanced precision.

    Measured DPI below setting

    Movement was shorter than the ruler distance, or the sensor is skipping on a glossy surface. Use a cloth pad.