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