There are total 9 hours or 540 minutes from 4am to 1pm. In words, this duration is equal to nine hours or five hundred forty minutes.
How many hours from
| 8AM to 4PM | 6PM to 8AM | 12AM to 2AM |
| 3AM to 5AM | 3AM to 7AM | 11PM to 9PM |
| 10AM to 11AM | 4AM to 5AM | 2AM to 11PM |
| 1PM to 11AM | 3AM to 3PM | 5AM to 6AM |
| 10PM to 1AM | 12AM to 2PM | 2PM to 10PM |
| 9AM to 3AM | 2PM to 8PM | 2AM to 6PM |
