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
| 10AM to 9AM | 1PM to 2PM | 1AM to 4PM |
| 8PM to 9AM | 7AM to 9AM | 1PM to 11AM |
| 12PM to 4AM | 8AM to 7PM | 8AM to 12AM |
| 1AM to 7AM | 8PM to 2PM | 9AM to 4AM |
| 1PM to 10AM | 8AM to 11AM | 8AM to 10PM |
| 2AM to 6AM | 6AM to 10AM | 8AM to 5PM |
