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