There are total 4 hours or 240 minutes from 9am to 1pm. In words, this duration is equal to four hours or two hundred forty minutes.
How many hours from
| 8PM to 10AM | 8AM to 1PM | 7PM to 6AM |
| 12PM to 1AM | 2AM to 4PM | 12AM to 1AM |
| 11AM to 11PM | 7PM to 8AM | 12AM to 7PM |
| 9AM to 7AM | 3AM to 4AM | 11PM to 1PM |
| 10AM to 7PM | 4PM to 10AM | 1PM to 8PM |
| 6PM to 10AM | 6PM to 7AM | 10AM to 11PM |
