There are total 21 hours or 1260 minutes from 9pm to 6pm. In words, this duration is equal to twenty-one hours or one thousand two hundred sixty minutes.
How many hours from
| 9AM to 1AM | 1AM to 9PM | 11AM to 10PM |
| 1AM to 11PM | 11AM to 6AM | 11PM to 7PM |
| 5PM to 12AM | 4PM to 11AM | 1PM to 8PM |
| 9AM to 10PM | 7AM to 1AM | 1PM to 3AM |
| 5AM to 1AM | 2AM to 10AM | 7AM to 8PM |
| 7PM to 10AM | 8AM to 5AM | 6AM to 2AM |
