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