1AM to Military Time
1AM = 0100
Spoken aloud: “zero one 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 1AM becomes 0100
1:00 AM in military time is 0100. 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 0100.
One in the morning — deep in the mid watch at sea, the 0000–0400 shift that carries a ship through the night.
Writing it down
Four digits, no colon, no AM or PM: 0100. Spoken, that is “zero one hundred hours”. If minutes are involved, they slot straight in without any change — 1:45 AM is 0145.
Common questions about 0100
What is 1AM in military time?
1AM in military time is 0100. It is an AM hour, so the hour stays the same and only gains a leading zero.
How do you say 0100 out loud?
0100 is spoken “zero one hundred hours”. The word “hundred” is used because the minutes are zero; at 0130 you would say “zero one thirty hours” instead.
Is 0100 AM or PM?
0100 is AM — it converts to 1:00 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.