Key takeaways
- eDPI = mouse DPI × in-game sensitivity — one number for feel.
- Only eDPI compares sensitivity fairly across mice and games.
- Keep eDPI constant when you swap mice; just solve for the new DPI.
The formula
eDPI = Mouse DPI × In-game sensitivity. That is the whole thing. A 400 DPI mouse at 2.0 sens gives 800 eDPI. So does 800 DPI at 1.0, or 1600 DPI at 0.5. Different hardware, identical feel — because eDPI is what actually describes how far your crosshair moves per inch of hand travel.
Why it is the only fair comparison
DPI alone lies. Two people on 800 DPI can feel worlds apart once sensitivity enters. eDPI collapses both into one number, so you can ask real questions: "Is my VALORANT sens close to the pros?" "If I copy a CS2 player's sens, what DPI do I need to match their eDPI?" The in-site eDPI calculator does this in one step.
It also survives hardware swaps. Upgrade your mouse, keep your eDPI, and your aim stays put — you just solve for the new DPI.
A worked example
Say you run 800 DPI at 1.2 sensitivity in CS2. Your eDPI is 800 × 1.2 = 960. A friend runs 400 DPI at 2.4 — also 960 eDPI. Same hardware, different numbers, but identical feel. That is the point: eDPI is the number that actually travels with you across mice and games.
Where to find your numbers
Your mouse DPI is set in the mouse driver (often a toggle: 400 / 800 / 1600). Your in-game sensitivity lives in the game's settings menu. Multiply them and you have your eDPI. If you would rather not do the math, the in-site eDPI calculator takes both inputs and returns the result instantly.