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Mouse DPI Test

Estimate your real mouse DPI by moving it a known distance. You need a ruler and a minute of patience.

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Estimated DPI
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Click at the left end to start Click the bar at its left end to start a measurement.

A browser cannot read your mouse's DPI directly. This estimates it from how far the cursor travels, so results depend on your operating-system settings (see the checklist below).

How to use the Mouse DPI Test

  1. Set Windows pointer speed to the default 6/11 and turn Enhance pointer precision off (macOS: turn off tracking acceleration). Browser zoom should be 100%.
  2. Put a ruler beside your mouse and choose a distance (1 inch is easiest).
  3. Click the bar at its left end, move your mouse exactly that distance to the right, and click again.
  4. Repeat two or three times; the tool shows the average and the closest common DPI setting.

Understanding your results

DPI means dots (counts) per inch: how many counts the mouse reports for one inch of physical movement. The tool multiplies the cursor's travel in pixels by your device pixel ratio and divides by the inches you moved. With acceleration off and default pointer speed, one count equals one pixel, so the arithmetic gives your DPI.

What is mouse DPI?

DPI (dots per inch), sometimes written CPI (counts per inch), describes how sensitive the mouse sensor is. At 800 DPI, moving the mouse one inch sends 800 counts to the computer; at 1600 DPI it sends 1600, so the cursor travels twice as far for the same hand movement. It is one half of your overall sensitivity — the other half is the sensitivity setting in your game or operating system. Combine the two with our eDPI calculator.

Why the result can be off

  • Pointer acceleration changes how far the cursor moves for fast and slow movements.
  • Windows pointer speed other than 6/11 scales the movement.
  • High DPI at 1 inch may push the cursor off the edge of a small screen; use the ½ inch option.
  • Measurement error: a few millimetres of ruler error is a few percent of DPI. Average several runs.

Common DPI settings

Office mice often sit around 800 to 1200 DPI. Many gamers use 400 to 1600 DPI together with a lower in-game sensitivity. Very high DPI such as 3200 or more is mostly useful on high-resolution displays. What matters is the combination of DPI and sensitivity, not the DPI number alone.

Tips to improve

  • Measure with a real ruler against the mouse, not by eye.
  • Keep the movement straight and level.
  • If your result is close to 400, 800, 1600 or 3200, that is probably your setting.

Frequently asked questions

No. Browsers do not expose it, so any online DPI test estimates it from measured movement.

Mice often report their DPI steps slightly off, and OS settings, scaling and measurement error all add differences of a few percent.

Whatever feels comfortable. Many players pick 800 DPI and tune sensitivity in the game.