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