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