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