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