SteamDB's calculator can tell you that: https://steamdb.info/calculator/ https://steamdb.info/calculator/ It splits out a chart showing you how many games you

SteamDB's calculator can tell you that: https://steamdb.info/calculator/ https://steamdb.info/calculator/ It splits out a chart showing you how many games you have in a few different playtime categories ("12 or more hours", "6 to 12 hours", "Never played", etc.)