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