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