There are total 19 hours or 1140 minutes from 1am to 8pm. In words, this duration is equal to nineteen hours or one thousand one hundred forty minutes.
How many hours from
| 12AM to 9AM | 10PM to 7AM | 9AM to 8PM |
| 1PM to 7PM | 2PM to 4PM | 10AM to 4AM |
| 12AM to 5AM | 5PM to 10AM | 10AM to 11AM |
| 11AM to 3AM | 9AM to 7AM | 2PM to 8PM |
| 3AM to 7PM | 2AM to 4AM | 4AM to 7AM |
| 4PM to 2PM | 7AM to 8PM | 11AM to 12AM |
