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