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Measurement tool

Mouse DPI Analyzer

Measure the DPI your mouse actually reports over a known distance, and use the result in the sensitivity converter.Methodology

MethodPhysical Distance
Mode2D Count

Browser measurement

Measure your mouse DPI

Mark a distance, enter your configured DPI, then press and hold the pad while you move the mouse in a straight line. Release to compare your actual DPI with the configured value.

Leave blank to measure actual DPI without a target.

Mark this distance on your mousepad or paper.

Use the same unit you marked.

Pick the axis with the most room.

Move the mouse along the selected axis in one straight line. Release the button, press Stop, or press Esc to finish.

Enter a distance and press the pad to start.

How to measure your mouse DPI

A DPI measurement compares the counts your mouse reports with the physical distance you move it. The setup matters as much as the movement: mark a clear distance, keep the mouse flat and move in one straight line.

  1. Mark the distance. Mark a start line and a finish line on your mousepad or paper. Measure the distance the mouse itself will travel, not the edge-to-edge width of the surface.
  2. Enter the setup. Enter your configured DPI if you know it, then enter the marked target distance and choose centimeters or inches. Leave DPI blank if you only want the measured value.
  3. Choose an axis. Pick the axis with the most clear space: X+ right, X− left, Y+ up or Y− down. Use the same axis for repeated runs.
  4. Measure the movement. Press and hold the measurement pad, move the mouse the full distance in one straight line, then release. Press Stop or Esc if you need to end the run early.
  5. Compare and repeat. Compare actual DPI, actual counts and deviation. Repeat two or three times and use a consistent result rather than a single outlier.

Repeat the run two or three times. A single result can be skewed by a curved movement, a lift-off, or a change in the active mouse profile.

What the numbers mean

Actual DPI
The counts recorded during the run divided by the distance in inches. This is the value the browser observed.
Actual counts
The movement counts recorded along the selected axis.
Target counts
The counts expected from your configured DPI over the same distance. This is blank when you leave the configured DPI field empty.
Deviation
The difference between actual and target counts as a percentage of the target. A small deviation is normal; a large one is worth investigating.

Why your measured DPI can differ

A mouse can report a different count rate from the number printed in its software. Common causes include:

  • a different active DPI profile or onboard profile slot;
  • CPI scaling or a manufacturer’s “DPI” approximation;
  • Windows pointer speed, pointer acceleration or a game’s raw-input setting;
  • sensor variance, lift-off distance, surface texture or a tilted mouse;
  • a marked distance that is shorter or longer than the distance the mouse travelled.

The analyzer requests unadjusted movement where the browser supports it. That reduces operating-system pointer processing, but it does not turn a browser measurement into a laboratory instrument. Use the same mouse, surface, profile and cable or receiver for every run.

DPI, eDPI and cm/360

DPI is the mouse-side count rate. It is not the same as in-game sensitivity. Inside a game, eDPI combines DPI and sensitivity, while cm/360 describes the physical distance needed for a full turn.

If your measured DPI is different from the value you use in a conversion, your physical turn distance will change. Measure first, then use the measured value in the sensitivity converter. For the underlying concepts, read mouse DPI explained, what eDPI means, and how cm/360 is calculated.

FAQ

Is this mouse DPI analyzer accurate?

It measures the counts your browser receives over the distance you enter. Use a straight line, repeat the run two or three times and keep the same mouse settings. It is a practical check, not a lab-grade sensor measurement.

Do I need to install software?

No. The analyzer runs in your browser and the measurement stays on your device. You need a desktop browser and a mouse.

What is the difference between DPI and CPI?

DPI is the common term. CPI, or counts per inch, is the more literal description of what a mouse sensor reports. Many manufacturers use DPI for both.

Why is my measured DPI different from my configured DPI?

Mouse profiles, CPI scaling, pointer speed, acceleration, sensor variance and the distance you marked can all change the result. Check the active profile first.

Does Windows pointer speed affect the measurement?

It can. The analyzer requests unadjusted movement where the browser supports it, which reduces operating-system pointer processing. If that option is unavailable, the result may be affected.

Which axis should I use?

Use the axis with the most clear space. X+ is left to right, X− is right to left, Y+ is bottom to top and Y− is top to bottom. You can repeat on another axis to compare.

Can I measure DPI on a phone?

No. Touch input does not report mouse counts, so the analyzer needs a desktop device with a mouse. Read more about mouse DPI

Related tools and guides

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Last reviewed: 3 November 2026