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