There are total 1 hours or 60 minutes from 8am to 9am. In words, this duration is equal to one hours or sixty minutes.
How many hours from
| 10AM to 4PM | 11PM to 8AM | 3AM to 10AM |
| 12PM to 8PM | 3PM to 5AM | 3PM to 6PM |
| 10AM to 6PM | 6AM to 11AM | 5AM to 4AM |
| 6AM to 10AM | 8AM to 6AM | 9PM to 1PM |
| 5AM to 2AM | 11AM to 12AM | 5PM to 4AM |
| 3AM to 8PM | 1AM to 10PM | 9AM to 5AM |
