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