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