How it's calculated
HH = h + 12 (PM) ; HH = 0 (12 AM) ; HH = h (other AM)
h = 12-hour clock hour, HH = 24-hour hour. 12 AM → 00, 12 PM → 12, 1–11 PM add 12. Minutes are unchanged.
Common values
| 12-hour | 24-hour (military) |
|---|---|
| 12:00 AM | 0000 |
| 6:30 AM | 0630 |
| 12:00 PM | 1200 |
| 1:00 PM | 1300 |
| 11:45 PM | 2345 |
Common questions
What is midnight in military time?
Midnight is 0000, spoken as zero hundred hours. The end of the day, 11:59 PM, is 2359.
How do I convert PM times?
For 1 PM through 11 PM, add 12 to the hour. So 3 PM becomes 1500. Noon stays 1200 and 12 AM is 0000.