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