Mouse DPI Analyzer
Find out what DPI your mouse actually outputs, no driver software, no downloads. Count sensor steps over a measured distance and get your real value.
- Runs in your browser
- Free · No sign-up
- Works with any mouse
- Turn off mouse acceleration: Windows → Mouse settings → Pointer Options → uncheck "Enhance pointer precision".
- Keep in-game sensitivity out of it. This measures hardware, not software settings.
- Have a ruler or tape measure ready (cm or inches).
DPI analyzer tool
Privacy: reading mouse counts happens locally in your browser; nothing is uploaded or stored after you leave.
How the measurement works
effective DPI = total mouse counts ÷ distance in inches
A mouse reporting 800 DPI sends 800 counts per inch of physical travel. The browser's pointer lock exposes the counts your operating system receives (movementX/Y), so a straight measured drag gives you a direct read of effective DPI. With acceleration off, this matches the number your mouse driver reports, and reveals what it actually is when the label and driver disagree.
Common reasons a measured value differs from the box: wrong driver profile, acceleration on, or sensor variance (≤ ±3%).
Typical DPI settings
| DPI | Who uses it |
|---|---|
| 400 / 800 | Common tournament defaults for tacticals (CS2, Valorant) |
| 800 / 1600 | Most common gaming defaults from drivers |
| 1600 / 3200 | High-DPI players who lower in-game sensitivity instead |
| 4000+ | Mainly for desktop use or macro work; rare in competitive FPS |
Frequently asked questions
How does this DPI analyzer work?
The tool counts every mouse step (count) your sensor reports while you move the mouse in a straight line, then divides by the physical distance you measured with a ruler: DPI = counts ÷ inches. That gives your effective mouse DPI as the operating system reports it.
Why is my measured DPI different from the advertised DPI?
Three common reasons: (1) your driver is set to a different DPI step than you thought; (2) Windows pointer acceleration ("Enhance pointer precision") is still on and skews the count rate; (3) sensors have small variance (±1–3%) from the nominal value. That is why measuring beats trusting the label.
Do I need to disable mouse acceleration first?
Yes. On Windows: Settings → Bluetooth & devices → Mouse → Additional mouse settings → Pointer Options → uncheck "Enhance pointer precision". With acceleration on, your counts depend on how fast you move, and the measurement will be wrong.
How accurate is the result?
With a ruler, a slow steady drag, and acceleration off, typical accuracy is within ±2–3%, good enough to confirm whether you are really on 400/800/1600 DPI. Repeat the measurement three times and average for the best number.
Does this work with my brand of mouse?
Yes, any mouse works, because the tool reads counts the operating system reports. It measures effective DPI (post-driver). Logitech, Razer, SteelSeries, Pulsar, Zowie and generic mice are all fine.
Why does the counter need to keep the pointer locked?
Pointer lock keeps your cursor from hitting the screen edge, which is the classic problem when measuring long distances. While measuring, your cursor is hidden and the tool tallies every step; press Stop (or Esc) to finish.