There are total 1 hours or 60 minutes from 1am to 2am. In words, this duration is equal to one hours or sixty minutes.
How many hours from
| 9PM to 11PM | 8AM to 10AM | 11AM to 7AM |
| 5PM to 10AM | 6AM to 11PM | 1PM to 7PM |
| 2PM to 8AM | 8AM to 2PM | 4AM to 9AM |
| 5PM to 11AM | 9PM to 6PM | 6PM to 4AM |
| 1PM to 8AM | 5PM to 4PM | 3AM to 4AM |
| 4AM to 9PM | 10PM to 5AM | 1AM to 7AM |
