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