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