4AM to Military Time
4AM = 0400
Spoken aloud: “zero four hundred hours”
Convert another time
Type in either box — it converts as you type. Accepts 1300, 13:00, 1:00 PM, 0000 and 2400.
How 4AM becomes 0400
4:00 AM in military time is 0400. It is a morning time, so the hour stays exactly as it is — you only pad it with a leading zero and drop the colon, giving 0400.
Four in the morning. Watch change at sea: the morning watch runs 0400–0800.
Writing it down
Four digits, no colon, no AM or PM: 0400. Spoken, that is “zero four hundred hours”. If minutes are involved, they slot straight in without any change — 4:45 AM is 0445.
Common questions about 0400
What is 4AM in military time?
4AM in military time is 0400. It is an AM hour, so the hour stays the same and only gains a leading zero.
How do you say 0400 out loud?
0400 is spoken “zero four hundred hours”. The word “hundred” is used because the minutes are zero; at 0430 you would say “zero four thirty hours” instead.
Is 0400 AM or PM?
0400 is AM — it converts to 4:00 AM. Military time has no AM or PM at all: every hour from 0000 to 2300 has its own number, which is the whole point of the format.