There are total 4 hours or 240 minutes from 8am to 12pm. In words, this duration is equal to four hours or two hundred forty minutes.
How many hours from
| 8AM to 9PM | 12PM to 9PM | 7PM to 4PM |
| 12AM to 9PM | 9AM to 12PM | 10PM to 8AM |
| 5PM to 8AM | 11AM to 12AM | 4AM to 2AM |
| 1AM to 2AM | 1PM to 6AM | 5AM to 6AM |
| 11AM to 12AM | 1PM to 11PM | 6PM to 7PM |
| 9AM to 7AM | 5AM to 7PM | 11AM to 4PM |
