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