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