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
| 9PM to 5AM | 7AM to 8PM | 5AM to 5PM |
| 4PM to 10AM | 5AM to 9AM | 11PM to 8PM |
| 9AM to 10AM | 11AM to 7AM | 10AM to 8PM |
| 7AM to 1AM | 8AM to 6AM | 3PM to 2PM |
| 12PM to 5AM | 1AM to 5AM | 12AM to 4PM |
| 11AM to 10AM | 5AM to 9AM | 12PM to 1AM |
