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