There are total 7 hours or 420 minutes from 1pm to 8pm. In words, this duration is equal to seven hours or four hundred twenty minutes.
How many hours from
| 10AM to 12AM | 10AM to 8PM | 6AM to 7AM |
| 8AM to 4PM | 8PM to 12AM | 9AM to 10AM |
| 11PM to 5AM | 8AM to 12AM | 9AM to 12PM |
| 11PM to 8AM | 8AM to 1PM | 2AM to 1PM |
| 7PM to 4AM | 5PM to 7AM | 12AM to 10AM |
| 11PM to 4AM | 6PM to 4AM | 8AM to 11AM |
