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