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