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