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