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