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