Technology

Mouse DPI Calculator

Calculate your effective DPI (eDPI) and cm/360 turn distance from your mouse DPI and in-game sensitivity. Compare aim sensitivity fairly across any setup.

Mouse DPI Calculator

Mouse DPI

In-game sensitivity

Yaw (degrees per count) — optional

Method

How this calculator works

eDPI = DPI × in-game sensitivity. cm/360 = (2.54 × 360) ÷ (DPI × sensitivity × yaw), where yaw defaults to 0.022 for Source-engine games.

Enter your mouse DPI (the value set in your mouse software, e.g. 800).
Enter your in-game sensitivity (e.g. 1.5).
Optionally adjust the yaw constant; leave it at 0.022 for Source-engine games.
The tool multiplies DPI by sensitivity to get eDPI and uses the yaw to compute your cm/360 turn distance.

Examples

Worked examples

Real numbers, end-to-end results.

800 DPI × 1.5 sensitivity (yaw 0.022)

eDPI = 1200, cm/360 ≈ 34.62 cm

cm/360 = (2.54 × 360) ÷ (800 × 1.5 × 0.022) = 914.4 ÷ 26.4 ≈ 34.62 cm.

400 DPI × 2.0 sensitivity (yaw 0.022)

eDPI = 800, cm/360 ≈ 51.95 cm

A lower eDPI produces a slower, more precise setup requiring more desk space per turn.

Use cases

When to use it

Matching your aim feel when switching to a new mouse or DPI setting.
Comparing your sensitivity to a pro player's published eDPI.
Converting a favourite setup between two Source-engine games.
Finding a consistent cm/360 across multiple titles for muscle memory.

FAQ

Frequently asked questions

What is eDPI?

eDPI, or effective dots per inch, is your mouse DPI multiplied by your in-game sensitivity. It gives a single number that represents your true aiming speed, letting you compare sensitivity across different mice and games even when the raw DPI and sensitivity values differ.

Why is eDPI better than sensitivity for comparing setups?

Two players can feel identical aim while using very different numbers—one at 400 DPI and 2.0 sensitivity, another at 800 DPI and 1.0 sensitivity. Both have an eDPI of 800. Because eDPI multiplies the two values together, it normalises them into one comparable figure.

What is cm/360?

cm/360 is the physical distance, in centimetres, that you must move your mouse to turn your in-game character a full 360 degrees. Lower cm/360 means a faster, twitchier setup; higher cm/360 means a slower, more precise one. It is the most hardware-independent way to describe sensitivity.

What is the yaw value and why is it 0.022?

Yaw is the constant that converts one 'sensitivity unit' into degrees of rotation per mouse count in a specific game engine. Source-engine games such as CS2 and Team Fortress 2 use a yaw of 0.022 degrees per count. Other engines use different values, so change it if your game differs.

Should I use a high or low sensitivity?

Most competitive first-person-shooter players favour a relatively low eDPI—commonly between 400 and 1600—corresponding to roughly 20–60 cm/360. Lower sensitivities give finer micro-adjustments for precise aim, while higher ones allow faster flicks and turns at the cost of accuracy.