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