There are total 21 hours or 1260 minutes from 9am to 6am. In words, this duration is equal to twenty-one hours or one thousand two hundred sixty minutes.
How many hours from
| 4AM to 10PM | 2AM to 11PM | 10AM to 11PM |
| 7AM to 4PM | 6PM to 5AM | 5AM to 2AM |
| 1AM to 12AM | 2AM to 12PM | 4PM to 7PM |
| 5AM to 5PM | 4AM to 2PM | 5AM to 11AM |
| 7AM to 5AM | 6PM to 11PM | 4PM to 12AM |
| 3AM to 5PM | 2AM to 11PM | 11PM to 4PM |
