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