it's 1 tick per minute under normal battle/siege.
But If you play DTV...I don't KNOW the exact conversion. I came up with 53 hours, assuming normal play time.1838 plus all possible ticks used to date(24*28*2). Gets you like 3100 total ticks to date give or take 2-3 days. Leave as is for minutes played. Divide by 60 to get your hours. Divide by 24 to get your days.