What is eDPI?
eDPI (effective DPI) = mouse DPI × in-game sensitivity. Two players with different DPI settings can have identical aim: 800 DPI at 0.4 and 1600 DPI at 0.2 are both 320 eDPI in Valorant.
eDPI only compares players within the same game. Each game turns the camera by a different angle per mouse count, so 320 eDPI in Valorant feels nothing like 320 eDPI in CS2. To compare across games, use cm/360.
What is cm/360?
cm/360 is how many centimetres you move the mouse to turn a full circle in game. It's the one number that means the same in every game. As a rough guide, above about 45 cm is low sensitivity (arm aiming) and below about 25 cm is high (wrist aiming).