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