There are total 1 hours or 60 minutes from 3am to 4am. In words, this duration is equal to one hours or sixty minutes.
How many hours from
| 12AM to 6PM | 10PM to 2AM | 9PM to 4PM |
| 10PM to 9PM | 8AM to 9PM | 4AM to 5PM |
| 11PM to 12PM | 5PM to 7AM | 9PM to 12AM |
| 10AM to 6PM | 6PM to 1PM | 9PM to 5AM |
| 11PM to 7PM | 1PM to 5PM | 4AM to 4PM |
| 4AM to 9PM | 1PM to 6PM | 7PM to 4AM |
