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