To calculate a duration of 0 days, 12 hours, and 25 minutes in the future, you need to convert the 12 hours and 25 minutes into a unified unit, such as minutes. Start by converting 12 hours to minutes. Since 1 hour is equal to 60 minutes, 12 hours equals 720 minutes. Next, add the 725 minutes to the initial duration of 0 days to get the final duration in minutes.