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
| 4PM to 3PM | 12PM to 10AM | 12PM to 5AM |
| 5PM to 4PM | 4AM to 5AM | 10AM to 8AM |
| 9AM to 6AM | 9PM to 10AM | 2AM to 3PM |
| 8AM to 8PM | 12PM to 2AM | 5PM to 5AM |
| 1PM to 2PM | 5PM to 12PM | 7AM to 6AM |
| 4AM to 12PM | 12AM to 7PM | 6AM to 10AM |
