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