Mouse DPI and Sensitivity, Explained (with eDPI Calculator)

By Joy Jacob · Updated 2026-06-12 · 3 min read

Ask ten players what sensitivity they use and you'll get ten numbers that mean nothing on their own. "400 DPI, 0.5 in-game" and "800 DPI, 0.25 in-game" feel identical in the hand — same physical motion, same crosshair speed. The number that matters isn't DPI or in-game sens alone; it's how far your hand has to move to turn all the way around. This guide untangles the four terms everyone mixes up, then gives you a calculator to find your real sensitivity and copy it perfectly into any other game.

The four numbers, in plain English

• DPI (or CPI) — dots per inch. A hardware setting on the mouse: how many "counts" it reports per inch of physical movement. Higher DPI = the cursor travels further for the same hand motion.
• In-game sensitivity — a software multiplier inside each game. It scales how much your view turns per mouse count. Every game uses its own scale, which is why "1.0" means something different in each one.
• eDPI — effective DPI, simply DPI × in-game sensitivity. It collapses the two settings above into one number you can compare between players on the same game.
• cm/360 — how many centimetres of mouse movement it takes to spin a full 360°. This is the real, game-independent measure of how fast you aim. Lower = faster/twitchier; higher = slower/more precise.

Why pros use low DPI

You'll often hear "use 400 or 800 DPI." It isn't superstition. Very high DPI can expose sensor jitter and, on some setups, adds a tiny amount of smoothing or processing. 400–1600 DPI sits in the clean, well-behaved range for virtually every modern sensor. Within that range, pick a DPI and then set your cm/360 with the in-game slider. The exact DPI barely matters; your cm/360 is everything.

Find and match your sensitivity

Use the calculator below. Enter your DPI and in-game sensitivity, pick your game, and it returns your eDPI and your true cm/360. To copy a feel into a second game, match the cm/360, not the in-game number.

So what cm/360 should you use?

There's no single correct answer, but there are sensible ranges:

cm/360	Feel	Good for
20–30 cm	Slow, precise	Snipers, tactical shooters, small flicks with the whole arm
30–45 cm	Balanced	Most FPS players — the pro average lives here
45–60+ cm	Very slow	Long-range precision; needs a big mousepad and arm aiming
Under 20 cm	Fast, twitchy	Wrist aiming, fast-paced arena/movement shooters

If you're not sure, start around 30–40 cm/360, give it at least a week, and only change one variable at a time. Constantly switching sensitivity is the single most common reason aim never stabilises — your muscle memory never gets to set.

Lower it, then commit

Most newer players aim too fast because a high sens feels responsive and "snappy." It also makes micro-adjustments nearly impossible. If your crosshair always overshoots the target, your cm/360 is probably too low (sens too high). Drop it, adapt for a week, and pair the new setting with a structured warm-up — see our 20-minute aim training routine. And remember that aim isn't only sensitivity: if the game itself feels delayed, work through how to reduce input lag first, because no sensitivity fixes a laggy signal.