There are total 7 hours or 420 minutes from 1am to 8am. In words, this duration is equal to seven hours or four hundred twenty minutes.
How many hours from
| 9AM to 12AM | 8PM to 2PM | 5AM to 7PM |
| 8AM to 9PM | 9PM to 3PM | 7PM to 8AM |
| 10PM to 3PM | 5AM to 8AM | 1AM to 4AM |
| 7AM to 11AM | 11PM to 7PM | 5PM to 12PM |
| 11AM to 1AM | 7PM to 1AM | 5PM to 1AM |
| 9PM to 8AM | 8AM to 3PM | 9AM to 1PM |
