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