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