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
| 8PM to 12PM | 11AM to 12AM | 2AM to 8PM |
| 4PM to 6AM | 5AM to 11AM | 3PM to 4AM |
| 7PM to 2AM | 4AM to 5PM | 3AM to 12AM |
| 11AM to 10AM | 10PM to 9AM | 12AM to 11PM |
| 1AM to 9AM | 5PM to 6AM | 6AM to 4PM |
| 9AM to 7AM | 3AM to 6PM | 12AM to 4AM |
