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