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
| 11PM to 12PM | 4PM to 11AM | 5PM to 4AM |
| 12PM to 9AM | 7AM to 12PM | 1AM to 3AM |
| 6PM to 11PM | 7AM to 9AM | 9AM to 8AM |
| 2AM to 10AM | 10PM to 7AM | 4AM to 2AM |
| 6PM to 1PM | 5AM to 12AM | 5AM to 10AM |
| 1PM to 9AM | 12PM to 11PM | 12AM to 1PM |
