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