There are total 12 hours or 720 minutes from 1am to 1pm. In words, this duration is equal to twelve hours or seven hundred twenty minutes.
How many hours from
| 10PM to 8AM | 7AM to 5AM | 9PM to 9AM |
| 10PM to 1PM | 12PM to 2AM | 8AM to 4PM |
| 1AM to 11PM | 9PM to 8AM | 6PM to 10PM |
| 12PM to 9PM | 3PM to 8AM | 10AM to 12PM |
| 6PM to 4PM | 7PM to 3PM | 10PM to 12AM |
| 8AM to 11PM | 11AM to 10AM | 9PM to 9AM |
