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