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