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