There are total 8 hours or 480 minutes from 1pm to 9pm. In words, this duration is equal to eight hours or four hundred eighty minutes.
How many hours from
| 6PM to 11PM | 11PM to 4AM | 9AM to 8PM |
| 12AM to 5AM | 1PM to 4AM | 8PM to 11PM |
| 2PM to 4PM | 2AM to 5AM | 7AM to 1AM |
| 8PM to 10PM | 7PM to 6AM | 3PM to 9PM |
| 1AM to 6AM | 6AM to 6PM | 5AM to 11AM |
| 1PM to 12PM | 3PM to 3AM | 7PM to 8PM |
