There are total 7 hours or 420 minutes from 1pm to 8pm. In words, this duration is equal to seven hours or four hundred twenty minutes.
How many hours from
| 1AM to 3PM | 3AM to 5PM | 6PM to 8AM |
| 4AM to 3PM | 1AM to 6AM | 2AM to 7PM |
| 3AM to 4AM | 1AM to 12AM | 10AM to 6AM |
| 3PM to 2PM | 2PM to 5AM | 12AM to 8AM |
| 3AM to 1PM | 10PM to 9PM | 5PM to 11AM |
| 4AM to 11AM | 8PM to 9AM | 2AM to 8PM |
