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