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