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