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