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