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