18:00 in 12-Hour Time
18:00 is 6:00 PM.
Written 1800 in military time and said “eighteen hundred hours”. Going the other way, 6:00 PM is 18:00.
The 18:00 hour is the hour evening services, classes and dinner reservations are timed from.
24-hour clock
18:00
12-hour clock
6:00 PM
Said aloud: “eighteen hundred hours” on the 24-hour clock, “six o'clock in the evening” on the 12-hour one.
Why 18:00 converts the way it does
This is the half of the day that actually changes. From 13:00 to 23:00, subtract 12 to get the 12-hour hour and label it PM: 18 − 12 = 6, so 18:xx is 6:xx PM. Going the other way, add 12 to any PM hour except 12 PM itself.
The minutes are the same on both clocks — a whole hour stays a whole hour — and 18:00 is in the evening, which is the information the AM/PM label is carrying.
Need this time to actually do something? Set an alarm for 6:00 PM, or use the timer to count a length of time instead of waiting for a clock time.
Common questions
What is 18:00 in 12-hour time?
18:00 is 6:00 PM. The minutes are unchanged; the hour is 18 − 12 = 6, and it takes PM.
What is 6:00 PM in 24-hour time?
6:00 PM is 18:00, written 1800 in military time.
How do you say 1800 out loud?
In military time it is said "eighteen hundred hours". On a 12-hour clock the same moment is "six o'clock in the evening".