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