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