There are total 12 hours or 720 minutes from 1am to 1pm. In words, this duration is equal to twelve hours or seven hundred twenty minutes.
How many hours from
| 9AM to 10PM | 10PM to 10AM | 2AM to 10AM |
| 4AM to 2AM | 7PM to 1PM | 7AM to 4AM |
| 12AM to 4PM | 10PM to 2AM | 2AM to 9AM |
| 11PM to 3PM | 5AM to 2AM | 11PM to 9AM |
| 1PM to 11AM | 11PM to 12PM | 6AM to 9PM |
| 4AM to 3PM | 8PM to 7PM | 9PM to 12PM |
