There are total 18 hours or 1080 minutes from 4am to 10pm. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 9AM to 9PM | 2AM to 5AM | 3AM to 2AM |
| 6AM to 3PM | 3AM to 6AM | 4PM to 2AM |
| 4PM to 8PM | 2PM to 5AM | 12PM to 2PM |
| 5PM to 6PM | 1PM to 5PM | 2PM to 12PM |
| 9AM to 10AM | 11AM to 6AM | 1PM to 10AM |
| 4PM to 5AM | 6PM to 6AM | 12AM to 11PM |
