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Online DPI analyzer

Mouse DPI Test

Estimate your mouse DPI with a ruler. Enter a measured distance, move your mouse and compare the result with your configured DPI.

  1. 01 Set distance
  2. 02 Prepare & align
  3. 03 Space to measure
Physical distance on your desk
Use a physical mouse and keyboard. Align the same mouse edge at both ruler marks.

Prepare first to enable free movement. Then align your mouse with the ruler before pressing Space.

Select Prepare Measurement, then align your mouse with the ruler’s starting mark.

Space Start / finish   Esc Cancel
Your cursor hides during free movement. In screen mode, start near the left edge and use a shorter ruler distance if needed.

What to do next

Estimated DPI differs from your setting?

  1. Prepare each run first, align the same mouse edge with the ruler, then press Space. Repeat the same physical distance three times.
  2. Keep the capture mode and system settings unchanged. In screen mode, use a shorter ruler distance if the pointer reaches the edge.
  3. Compare repeated estimates and read configured DPI in your mouse software. Browser movement does not certify hardware calibration, so a difference alone does not mean a fault.
Check report intervals separately →

How does this mouse DPI analyzer work?

This DPI analyzer divides browser-observed movement by the physical distance your mouse travels, in inches. Prepare free movement first, then align your mouse and press Space to start and finish. The result is an estimate; this page cannot read the DPI setting stored in your mouse.

  • DPI, CPI and mouse sensitivity

    DPI is the familiar name for mouse sensitivity settings. CPI means sensor counts per inch. Free movement requests unadjusted input when available; standard pointer lock may still include system adjustments. Screen mode measures screen pixels. Compare results only with the same capture mode and settings.

  • The calculation behind the estimate

    Estimated DPI = net browser movement distance ÷ physical distance in inches. For example, 800 movement units over 1 physical inch gives an estimate of 800. In screen mode, those units are screen pixels. Centimeters are converted using 2.54 cm per inch. None of these modes certifies a hardware DPI setting.

  • How to find your configured mouse DPI

    Check your mouse software, onboard profile or manufacturer’s instructions for the selected DPI setting. Enter it in Configured DPI if you want a percentage comparison. The maximum DPI on a product specification is not necessarily the setting you are using.

What your DPI test result means

Use the same capture mode, physical distance and system settings when comparing measurements. A difference from your configured DPI can reflect browser and system behavior as well as ruler error.

  • Distance to movecm / in
    Physical travel measured with a ruler
  • Configured DPIoptional
    The selected setting in your mouse software
  • Estimated DPIresult
    Browser movement per physical inch
  • Movement distanceunits / px
    Net movement; units depend on capture mode
  • Differencepercent
    Estimate compared with your configured DPI
  • Measurement statusstate
    Ready, measuring or completed

How to test mouse DPI with a ruler

  1. Place a ruler beside your mouse on the desk or mousepad. Enter the physical distance you plan to move; the default is 10 cm, and inches are also supported.

  2. Optionally enter Configured DPI for a percentage comparison. Leave it blank if you do not know the setting.

  3. Select Prepare Measurement. Free movement hides and locks the cursor so screen edges do not limit your travel. If it is unavailable, the page clearly switches to screen mode.

  4. After preparation, align the same edge of the mouse with the ruler’s starting mark, then press Space to begin. In screen mode, first place the pointer near the left edge of the measurement area.

  5. Move in a straight line to the end mark. Press Space again without moving the mouse farther to finish and read Estimated DPI.

  6. Select Prepare Another Measurement to repeat with the same capture mode, distance and settings. In screen mode, use the 1 cm option or reset and enter a shorter ruler distance if you reach the edge; short distances increase ruler error.

FAQ

Frequently Asked Questions

Can I check my DPI without mouse software?

You can estimate browser movement per inch with this ruler test without installing anything. Free movement tries to request unadjusted input, with clearly labeled standard-lock and screen-mode fallbacks. Confirm your configured sensor DPI in your mouse software or profile documentation; this page cannot read it directly.

Why is my DPI result different from 800 or 1600?

Capture mode, system settings and ruler error can affect the estimate. Free movement requests unadjusted input but cannot verify hardware calibration. Screen mode is also affected by pointer speed, acceleration and display scaling. Keep the mode and settings consistent when repeating.

Why was my measurement cancelled?

Escape, switching windows, hiding the page, resizing or losing pointer lock cancels the run without a partial result. Leaving the measurement area also cancels an active screen-mode run. Prepare again at the ruler’s starting mark to retry.

How can I make the DPI estimate more consistent?

Use a straight path, the same mouse edge at both ruler marks, and the same capture mode, distance and system settings. Align after preparation; movement before Space is not counted. In screen mode, use a distance that fits inside the area. Very short distances magnify ruler error.

Can this DPI tester check image or printer DPI?

No. This tool estimates mouse pointer movement per inch. It does not inspect image resolution, printer settings or monitor pixel density.

Use the polling rate test to estimate mouse Hz, or check buttons and scrolling on the home page.

HZPolling Rate TestMouse Hz looks lower than expected? Compare timed movement samples.ALLMouse TestCheck buttons, scrolling and movement.