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