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