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