What Is eDPI?
eDPI (effective dots per inch) is the single number gamers use to compare mouse sensitivity across different setups. Two players can use very different DPI and in-game sensitivity values yet aim identically — because what really matters is the product of the two. By multiplying your mouse DPI by your in-game sensitivity, eDPI gives you one apples-to-apples figure you can share, copy, or match.
How to Use This Calculator
Enter your mouse DPI (often 400, 800, or 1600) and the sensitivity value from your game settings (for example, 1.0 in many FPS titles). The calculator instantly returns your eDPI. To copy another player's feel, keep your DPI fixed and adjust your in-game sensitivity until your eDPI matches theirs.
The Formula Explained
The formula is simply $$\text{eDPI} = \text{DPI} \times \text{in-game sensitivity}$$ DPI is how many counts your mouse reports per inch of physical movement; sensitivity is the multiplier your game applies on top. Multiply them and you get the true effective resolution of your aim. A higher eDPI means the crosshair travels farther for the same hand movement.
Worked Example
Suppose your mouse is set to 800 DPI and your in-game sensitivity is 1.5. Your eDPI is $$800 \times 1.5 = 1{,}200$$ A teammate on 1600 DPI wanting the same feel would set sensitivity to \(1200 \div 1600 = 0.75\), also yielding an eDPI of 1,200.
FAQ
What is a good eDPI? Competitive FPS players commonly fall between 600 and 1600 eDPI, but the best value is whatever feels controllable to you.
Does eDPI transfer between games? eDPI compares sensitivity within the same game's scale. Different games use different multipliers, so you may need conversion tools to match feel across titles.
Should I change DPI or sensitivity? For the smoothest tracking, keep DPI at a native value your mouse handles well (like 800) and adjust in-game sensitivity to reach your target eDPI.
