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