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