There are total 15 hours or 900 minutes from 10pm to 1pm. In words, this duration is equal to fifteen hours or nine hundred minutes.
How many hours from
| 1AM to 11PM | 9AM to 9PM | 7PM to 11PM |
| 8PM to 4AM | 7PM to 3AM | 4PM to 4AM |
| 1AM to 11AM | 1PM to 4AM | 12PM to 5AM |
| 11PM to 5AM | 3PM to 12PM | 1AM to 11PM |
| 6PM to 7PM | 2AM to 6AM | 6PM to 5AM |
| 10PM to 9AM | 12PM to 7AM | 3PM to 11PM |
