Mouse Diagnostic

DPI Analyzer & Calculator

Calculate true mouse DPI and sensitivity accuracy online. Measure physical mouse movement against pixel travel free.

Move mouse horizontally across a physical ruler by your selected target distance.

DRAG MOUSE HORIZONTALLY ACROSS RULER DISTANCE 0 DPI 0 pixels traversed

DPI Presets & Benchmarks

Most competitive esports players use 400, 800, or 1600 DPI combined with low in-game sensitivity for optimal pixel precision.

What would you like to do next?

Fix Problem

Repair Guide

Step-by-step tutorial to calibrate or repair your controller.

View Repair Guides
Optimize

Game Settings

Get optimal deadzone & sensitivity settings for Apex, COD, Fortnite.

Optimize Settings
Upgrade

Controller Recommendations

Compare replacement controllers with hall-effect anti-drift sticks.

Compare Models

Test mouse polling rate

Measure USB report frequency in Hz up to 8000Hz.

Understanding Mouse DPI vs eDPI

DPI (Dots Per Inch) is a hardware specification of optical mouse sensors (PixArt, Hero, Focus+).

Frequently Asked Questions

How do I calculate my true mouse DPI?

Select your ruler distance (e.g. 2 inches) above, place your mouse at the 0-mark on a physical ruler, and drag horizontally across the ruler distance while holding left click.

What is mouse DPI (Dots Per Inch)?

DPI measures how many pixels your cursor moves on screen per physical inch of mouse movement. 800 DPI moves 800 pixels per inch; 1600 DPI moves 1600 pixels per inch.

What is eDPI in tactical shooters like Valorant and CS:GO?

eDPI (Effective DPI) is calculated by multiplying your mouse DPI by your in-game sensitivity (eDPI = Mouse DPI × In-Game Sensitivity).

100% Client-Side

All Gamepad API data stays in your browser. Zero tracking or data collection.

Instant Results

No downloads, plugins, or software installation needed. Works instantly.

Free Forever

No paywalls, subscription requirements, or hidden usage limits.