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