EDPI Calculator - Gaming Mouse Sensitivity

EDPI, short for Effective Dots Per Inch, is the single number that describes how sensitive your mouse actually feels inside a game. It is calculated by multiplying two values: the hardware DPI setting on your mouse, and the in-game sensitivity multiplier. A mouse set to 400 DPI with an in-game sensitivity of 2.0 has an eDPI of 800 — the same cursor movement per physical inch of mouse travel as a 800 DPI mouse at 1.0 sensitivity. That equivalence is what makes eDPI so powerful: it lets you compare setups across different hardware and different games using a single number. DPI alone tells you how many pixels the mouse cursor moves per inch of physical movement on your desk. A higher DPI means the cursor covers more pixels per inch. In-game sensitivity is a software multiplier applied on top of the DPI; most games default to 1.0, but players can lower it for more control or raise it for faster reactions. The product of these two values — eDPI — is what determines the actual rotational speed of your view or crosshair inside the game. Professional FPS players in titles like Counter-Strike, Valorant, and Apex Legends typically use very low eDPI values between 400 and 1000. The reason is muscle memory: at low sensitivity, the same physical mouse movement always produces nearly the same crosshair displacement. This predictability allows players to develop reliable flick shots and tracking over thousands of hours of practice. Common pro setups pair a 400 DPI mouse with sensitivity around 1.5 to 2.0, giving an eDPI of 600 to 800. The cm / 360° metric converts eDPI into a more intuitive physical measurement: the distance you need to move your mouse in a straight line to rotate your in-game view by exactly 360 degrees. A lower eDPI requires a longer physical sweep — for example, 800 eDPI requires approximately 45.7 cm for a full rotation, while 1600 eDPI requires only about 22.9 cm. Players with small mouse pads or who prefer wrist aiming tend toward higher eDPI values; players with extended pads who aim primarily with their arm prefer low eDPI. Field of View (FOV) also affects perceived sensitivity. Widening the FOV from 90° to 103° makes the same physical crosshair movement correspond to a smaller angular change in the world, effectively reducing sensitivity. If you change FOV between games, you can adjust your in-game sensitivity proportionally to maintain the same eDPI feel. The calculator provides a note when FOV is entered to flag any significant adjustment. To transfer your sensitivity between games, find the conversion ratio between the two game engines or use the eDPI as a bridge: set both games to produce the same eDPI and your aim will feel consistent from the first session. Many aim-training applications (Kovaak's, Aimlabs) also accept eDPI directly, making it the universal language of mouse sensitivity in competitive gaming.