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