There are total 8 hours or 480 minutes from 1am to 9am. In words, this duration is equal to eight hours or four hundred eighty minutes.
How many hours from
| 8AM to 10AM | 9AM to 9PM | 3PM to 8AM |
| 8AM to 9AM | 5AM to 7PM | 8AM to 2AM |
| 6PM to 4AM | 11PM to 1AM | 2AM to 9AM |
| 11AM to 1AM | 6PM to 7PM | 6PM to 8AM |
| 9AM to 11PM | 3AM to 5PM | 9AM to 8PM |
| 7AM to 8AM | 4PM to 9PM | 3AM to 4PM |
