Military Time Converter

Military time chart

Why 24-hour time exists

The 24-hour clock format often called military time in the U.S. numbers every hour of the day from 00 to 23, which removes the need for AM and PM labels entirely. The U.S. armed forces, along with most emergency services, hospitals, and aviation and maritime operations worldwide, use it because a schedule written as 0900 or 2100 can never be misread the way "9:00" can be misread as morning or night. That distinction matters when a shift change, a flight departure, or a medication dose is scheduled hours or days in advance and there's no room for a costly mix-up.

Converting between 12-hour and 24-hour time

Converting is a matter of adding or subtracting 12. For any time from 1:00 AM to 12:59 PM, drop the AM and add a leading zero if needed: 9:15 AM becomes 0915, and 12:30 PM (the noon hour) becomes 1230. For any time from 1:00 PM to 11:59 PM, add 12 to the hour: 2:00 PM becomes 1400, 6:45 PM becomes 1845, and 11:59 PM becomes 2359. Midnight is the one time that doesn't follow the "add 12" pattern 12:00 AM becomes 0000, not 1200.

The two mistakes almost everyone makes

Noon and midnight trip up more people than anything else. Noon (12:00 PM) is 1200 in military time not 0000. Midnight (12:00 AM) is 0000, marking the very start of a new day. Some schedules (particularly in logistics and some European rail timetables) use 2400 instead of 0000 to represent the end of the day being described, rather than the start of the next one but 0000 and 2400 refer to the exact same instant. This tool always converts midnight to 0000.

Where you'll actually see military time

Outside the U.S. military context, 24-hour time is simply the standard way most of the world writes clock time it's the norm on transit schedules, digital clocks, and everyday conversation across most of Europe, Latin America, Asia, and Africa. In the U.S., you'll mainly encounter it in aviation, hospitals and EMS documentation, law enforcement reports, and any 24/7 operation that needs zero ambiguity in shift scheduling.

FAQ

What does 0000 mean?
0000 is midnight at the very start of the day, equivalent to 12:00 AM.

How do you say military time out loud?
1430 is spoken as "fourteen thirty," and 0900 is spoken as "zero nine hundred."

Is 2400 the same as 0000?
Yes, they represent the same instant the stroke of midnight. Some timetables use 2400 to mark the end of the day being described, while 0000 marks the start of the next one, but this tool always displays midnight as 0000, which is the standard used by the U.S. military and most style guides.

Why is noon 1200 and not 0000?
Because the 24-hour clock counts up from midnight (0000) through the full 24 hours of the day, and noon falls exactly halfway through, at the 12th hour 1200. It's only midnight that resets to zero, not noon.

Do other countries use military time for everyday life?
Yes most countries outside the U.S. use the 24-hour format as their standard civilian time notation, not just for military or emergency use. It appears on train and flight schedules, digital clocks, and official documents throughout Europe, Latin America, and much of Asia.

Why do hospitals and emergency services use it?
Because a misread AM/PM label on a medication schedule, shift log, or incident report can cause serious errors. Writing 0300 instead of "3:00 AM" removes that ambiguity entirely, which is why it's standard in clinical documentation and dispatch logs.