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