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