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