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