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