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