There are total 21 hours or 1260 minutes from 12am to 9pm. In words, this duration is equal to twenty-one hours or one thousand two hundred sixty minutes.
How many hours from
| 5AM to 10AM | 3AM to 6PM | 9AM to 4AM |
| 3AM to 9PM | 9AM to 1PM | 3AM to 2PM |
| 8PM to 1AM | 1AM to 9AM | 10PM to 1AM |
| 3PM to 8AM | 7PM to 1PM | 5AM to 7PM |
| 1PM to 6AM | 5AM to 8AM | 12AM to 3AM |
| 10AM to 7PM | 10AM to 6PM | 9PM to 11AM |
