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