What eDPI Should You Use? Your Mousepad Already Decided

Ask what eDPI you should use and you will get the same three answers forever. Lower is better for aim. Higher is better for movement. Find what feels comfortable.

All three dodge the question, and all three ignore the one thing that actually limits you, which is sitting under your mouse right now and is a fixed number of millimetres wide.

Your mousepad has already decided a large part of this for you. Here is the maths, and here is the point at which a sensitivity stops being a preference and starts being physically impossible.

What eDPI is, in one line

eDPI is your mouse DPI multiplied by your in-game sensitivity. 800 DPI at 1.00 sensitivity is 800 eDPI. 400 DPI at 2.00 sensitivity is also 800 eDPI, and in CS2 those two setups move your crosshair identically.

That is the entire point of the number. Sensitivity on its own is meaningless because it depends on your DPI. eDPI is the only figure that can be compared between two players.

If you want the number for your own setup without doing the multiplication by hand, the eDPI Calculator does it and shows you the physical distance that comes with it.

The formula that converts eDPI into centimetres

CS2 turns your view by a fixed amount for every count your mouse reports. That amount is 0.022 degrees, multiplied by your sensitivity. It does not change between weapons, it does not change between maps, and it is the same for everyone.

From that single constant, the rest falls out:

cm per 360 = 41,563.6 divided by your eDPI

That is the whole thing. Nothing else in your config affects it.

At 800 eDPI you need 52 centimetres of mouse movement to spin a full circle. At 1600 eDPI you need 26. At 400 eDPI you need 104, which is more than a metre.

But a full 360 is not the movement that matters. Two others are.

A 180 is turning around to face someone behind you. You need it every time a flank lands, and it costs half of your cm per 360.

A 90 is swinging onto a hard angle, or turning down a corridor from a doorway. You need this one several times a round, and it costs a quarter of your cm per 360.

Look at where the two dashed lines sit. Those are not arbitrary. They are the usable width of a standard large pad and a standard XL pad, and the curves crossing them are the point where a turn stops fitting on your desk.

Your mousepad sets a hard floor on your eDPI

Standard mousepads come in a small number of widths. Small is 250 mm, medium is 350, large is 450, XL is 600, XXL is 800, and a full desk mat is 900.

You do not get all of that width. A typical gaming mouse is around 65 mm across, and the mouse has to physically fit on the pad at both ends of the swipe. So a 450 mm pad gives you about 38.5 centimetres of actual travel.

Now combine that with the formula. If a 180 costs you more centimetres than your pad has, you cannot do it in one motion. You have to swipe, lift, reset, and swipe again, while someone is shooting you in the back.

On a large 450 mm pad, the lowest eDPI that still lets you turn 180 in one motion is 540. Below that, every turnaround needs a lift.

On a medium 350 mm pad it is 729. On a small pad it is 1,123, which is higher than most players would ever willingly run.

Go the other way and an XL pad takes you down to 388, an XXL to 283, and a full desk mat to 249.

This is the part nobody tells you when they say lower sensitivity is better for aim. Lower sensitivity is better for aim right up until the point where your desk cannot contain the movement, and then it is worse at everything.

Find yourself on the grid

Here is every common pad size against every common eDPI, and whether a 180 fits in one motion.

Three things worth pulling out of it.

eDPI 400 only works on an XL pad or bigger. If you are running 400 eDPI on a large pad because a pro does, you are lifting on every single turnaround and you probably have not noticed because you have built the lift into your muscle memory.

The medium pad is the trap. It is the most commonly bundled size, it looks big enough, and it rules out everything below 729 eDPI. A huge number of players are running 600 or 640 on a pad that cannot support it.

Above 1200 eDPI, pad size stops mattering. Every size on the chart handles it. That is not an argument for playing at 1200, it is just the point where this particular constraint disappears and the usual trade-offs take over.

What to do with this

The honest answer to what eDPI should I use is a two step process, and the first step is not a preference.

Step one. Measure your pad and work out your floor. Take the width in millimetres, subtract 65 for the mouse, divide by 10 to get centimetres, then divide 20,782 by that number. That is the lowest eDPI your desk physically supports for a one motion 180. Do not go below it.

Step two. Pick inside the range that is left. Within what your pad allows, lower does give you finer control for precise aiming and higher does give you faster reactive turns. That part genuinely is preference, and it genuinely does come down to what you can repeat consistently.

If step one tells you that the sensitivity you have been fighting with for a year was never going to work on your pad, you have two options and both are fine. Raise your eDPI to the floor, or buy a wider pad. Buying the pad is usually the better one, because every point of eDPI you can afford to give back buys you precision you cannot get any other way.

Work out exactly where you currently sit with the eDPI Calculator, which gives you the number and the centimetres together.

If you came from another shooter and are still not sure your CS2 number matches what you were used to, convert it properly with the CS2 Sensitivity Converter and read the conversion guide for the multipliers behind it.

And once the number is right, leave it alone. The most common sensitivity mistake is not picking the wrong one, it is changing it every two weeks and never building muscle memory on anything. Why You Are Not Improving at CS2 covers why that pattern keeps people flat for years.