24-hour clock
The clock above shows the current time in 24-hour format, from 00:00 to 23:59. To convert any time after noon to 12-hour format, subtract 12: 17:45 is 5:45 PM.
24-hour to 12-hour conversion chart
| 24-hour | 12-hour | |
|---|---|---|
| 00:00 | 12:00 AM | midnight |
| 01:00 | 1:00 AM | |
| 02:00 | 2:00 AM | |
| 03:00 | 3:00 AM | |
| 04:00 | 4:00 AM | |
| 05:00 | 5:00 AM | |
| 06:00 | 6:00 AM | |
| 07:00 | 7:00 AM | |
| 08:00 | 8:00 AM | |
| 09:00 | 9:00 AM | |
| 10:00 | 10:00 AM | |
| 11:00 | 11:00 AM | |
| 12:00 | 12:00 PM | noon |
| 13:00 | 1:00 PM | |
| 14:00 | 2:00 PM | |
| 15:00 | 3:00 PM | |
| 16:00 | 4:00 PM | |
| 17:00 | 5:00 PM | |
| 18:00 | 6:00 PM | |
| 19:00 | 7:00 PM | |
| 20:00 | 8:00 PM | |
| 21:00 | 9:00 PM | |
| 22:00 | 10:00 PM | |
| 23:00 | 11:00 PM |
Why use the 24-hour clock?
It removes the AM/PM mix-ups that cause missed flights and wrong medication times, which is why it is standard in aviation, hospitals, the military, public transport and computing. Times also sort correctly as text: 09:30 comes before 14:00.
Questions people ask
What is the 24-hour clock?
A way of telling time that runs the hours from 00 to 23, so there is no AM or PM. 1 PM is 13:00, 6 PM is 18:00 and midnight is 00:00.
How do I convert 24-hour time to 12-hour time?
For hours 13 to 23, subtract 12 and add PM: 15:30 is 3:30 PM. 12:xx is PM, 00:xx is 12:xx AM, and 01:00 to 11:59 are AM with no change.
Is midnight 00:00 or 24:00?
Both are used. 00:00 is the start of a day and 24:00 the end of one, so 24:00 on Monday is the same moment as 00:00 on Tuesday. Timetables usually avoid 24:00 and write 23:59 or 00:00.
Which countries use the 24-hour clock?
Most of the world writes times in 24-hour format, especially in Europe, Latin America, Asia and Africa. The 12-hour clock is the everyday norm in the United States, Canada (English), the UK in speech, Australia, India, the Philippines and a few others.
Is the 24-hour clock the same as military time?
Almost. Military time drops the colon and says the hours aloud as hundreds: 18:00 is 'eighteen hundred'. See the military time converter.
More: military time converter · 12- or 24-hour online clock · being punctual