There are total 3 hours or 180 minutes from 1am to 4am. In words, this duration is equal to three hours or one hundred eighty minutes.
How many hours from
| 6AM to 9AM | 3PM to 8PM | 7PM to 5PM |
| 9AM to 11PM | 12AM to 8AM | 2AM to 10AM |
| 8PM to 3PM | 2AM to 7AM | 2AM to 5PM |
| 4AM to 9AM | 4AM to 5AM | 4AM to 7PM |
| 12AM to 8PM | 7AM to 4AM | 5AM to 9AM |
| 11PM to 2PM | 10AM to 5AM | 8PM to 3PM |
