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