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