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