There are total 20 hours or 1200 minutes from 4am to 12am. In words, this duration is equal to twenty hours or one thousand two hundred minutes.
How many hours from
| 1AM to 1PM | 1AM to 7AM | 3PM to 5AM |
| 10PM to 3PM | 1AM to 7AM | 7AM to 6AM |
| 6PM to 11AM | 9PM to 8AM | 4AM to 7PM |
| 7AM to 9PM | 2AM to 10PM | 10PM to 2PM |
| 7PM to 6AM | 6AM to 8AM | 7PM to 2AM |
| 6AM to 12PM | 11PM to 8AM | 5AM to 4AM |
