MouseTestLab

Mouse DPI Test (DPI Analyzer)

Move your mouse a measured distance three times. We read the counts it sends and work out its real DPI.

Set the distance, then press Start.

0 counts

Mode: –

    How to check your mouse DPI without software

    1. Set a distance

      Pick 10 cm or 4 inches (or your own). No ruler? A bank card is exactly 85.6 mm (3.37 in) wide.

    2. Hold and move

      Press Start, hold the left button, move the mouse exactly that distance in a straight line, then let go.

    3. Repeat three times

      We average three moves and tell you how consistent they were and how far you are from the rated DPI.

    This mouse DPI checker works with any mouse and any brand, and you do not need to install anything to check mouse DPI.

    How the DPI analyzer works

    DPI (dots per inch, also called CPI) is how many position counts your mouse sends per inch of movement. While you hold the button we lock the pointer and add up every count the mouse sends; dividing by the distance gives your real DPI.

    In Chrome and Edge we read the raw counts straight from the mouse, so Windows pointer speed and acceleration do not affect the result. Other browsers report the pointer after the system has scaled it; the result is then marked approximate and we tell you which settings to change.

    What your result means

    ± 5%

    On target

    Your mouse is within 5% of its rated DPI. That is normal sensor and measurement tolerance.

    5–10%

    A little off

    Measure again carefully. If it stays off, your mouse surface may affect the sensor.

    > 10%

    Clearly off

    Check that you set the distance correctly and that your mouse software is not applying a different DPI step.

    Why is my real DPI different from the advertised DPI?

    Every result is a bit high or low

    Likely cause
    Sensors have a tolerance, and some measure differently on different surfaces.
    What to do
    Normal within about 5%. If you care about exact numbers, adjust the DPI in your mouse software until the test matches.

    The three moves disagree

    Likely cause
    The moves were not the same length or not straight.
    What to do
    Line the mouse edge up with the ruler mark and move slowly. Consistency matters more than speed.

    Result changes with Windows pointer speed

    Likely cause
    Your browser does not support raw counts.
    What to do
    Use Chrome or Edge, or set pointer speed to 6 of 11 and turn off “Enhance pointer precision”.

    Mouse DPI test FAQ

    How can I check my mouse DPI?

    Set a distance on this page, press Start, then hold the left button and move the mouse exactly that distance three times. The analyzer divides the counts by the distance.

    How do I know if my mouse is 800 DPI?

    Enter 800 as the rated DPI and run the test. A result within about 5% of 800 means it is working at 800.

    Is 1600 or 3200 DPI better?

    Neither is better in itself. What matters is DPI multiplied by your in-game sensitivity (eDPI). Many players use 400–1600 DPI and adjust sensitivity in the game.

    Is 2400 DPI too high?

    Not if you lower your in-game sensitivity to match. Very high DPI with high sensitivity makes precise aim harder.

    Do I need a ruler?

    A ruler is best, but a bank card works: it is exactly 85.6 mm wide.

    Why does Windows pointer speed change my result?

    Only in browsers that cannot read raw counts. In Chrome and Edge the analyzer ignores pointer speed and acceleration.

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