eDPI Calculator
eDPI = mouse DPI × in-game sensitivity.
eDPI:
What eDPI is good for
eDPI lets you compare settings with other players of the same game: 800 DPI at 0.4 and 400 DPI at 0.8 are both 320 eDPI and feel the same. It does not carry across games, because each game scales sensitivity differently. To move your settings to another game, use the sens converter, which matches cm/360 instead.