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