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