There are total 1 hours or 60 minutes from 9am to 10am. In words, this duration is equal to one hours or sixty minutes.
How many hours from
| 1PM to 2AM | 4PM to 7AM | 5PM to 8PM |
| 1AM to 4PM | 12PM to 11PM | 2PM to 7PM |
| 7PM to 5PM | 9PM to 12PM | 1PM to 5AM |
| 2PM to 1PM | 4PM to 5PM | 1AM to 8PM |
| 1AM to 12PM | 8AM to 11AM | 5PM to 9PM |
| 11AM to 9PM | 12PM to 3AM | 4AM to 7PM |
