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
| 8PM to 7PM | 6PM to 8AM | 7AM to 6AM |
| 2PM to 5AM | 12PM to 3AM | 2AM to 1AM |
| 3PM to 6AM | 3PM to 5PM | 7PM to 10AM |
| 3PM to 4PM | 11PM to 4AM | 7AM to 1PM |
| 9AM to 6AM | 8PM to 3PM | 8AM to 6AM |
| 11PM to 10AM | 3AM to 9AM | 8PM to 4AM |
