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