There are total 9 hours or 540 minutes from 9am to 6pm. In words, this duration is equal to nine hours or five hundred forty minutes.
How many hours from
| 8AM to 8PM | 8PM to 4AM | 5PM to 4AM |
| 3PM to 6PM | 12PM to 5PM | 7AM to 3PM |
| 1AM to 10AM | 1AM to 2AM | 9PM to 2PM |
| 2PM to 4AM | 7PM to 6PM | 11PM to 6PM |
| 5AM to 6AM | 12AM to 5AM | 4PM to 9PM |
| 5PM to 8PM | 11PM to 3PM | 8PM to 10AM |
