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