There are total 9 hours or 540 minutes from 1pm to 10pm. In words, this duration is equal to nine hours or five hundred forty minutes.
How many hours from
| 8AM to 4PM | 11AM to 2AM | 8PM to 12AM |
| 1AM to 12AM | 6AM to 8AM | 8PM to 6PM |
| 12PM to 12AM | 1AM to 1PM | 6AM to 8AM |
| 11PM to 8AM | 6AM to 11AM | 9AM to 4AM |
| 12AM to 10PM | 7PM to 5PM | 11PM to 1PM |
| 10PM to 9PM | 7AM to 1PM | 5AM to 1AM |
