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