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