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