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