Free military time converter. Convert standard 12-hour AM/PM time to 24-hour military time and back instantly. Includes the full military time chart. Used in the military, medical, aviation, and payroll. Accurate, instant, no sign-up.
12-hour AM/PM ↔ 24-hour military time
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The armed forces, pilots, and air traffic control use 24-hour time to eliminate AM/PM confusion in critical operations.
Hospitals chart medications and vitals in 24-hour time so 7:00 (AM) is never mistaken for 19:00 (PM).
Time clocks, shift schedules, and international business often use 24-hour time for unambiguous records.
Military time (the 24-hour clock) counts hours from 0 to 23 instead of restarting at 12, eliminating any AM/PM ambiguity. Midnight is 0000 ("zero hundred"), 1:00 AM is 0100, noon is 1200, and the afternoon continues 1300 (1 PM), 1400 (2 PM), up to 2359 (11:59 PM). The conversion rule is simple: for PM times from 1:00 PM to 11:59 PM, add 12 to the hour (2:30 PM → 14:30 → 1430). For AM times, the hour stays the same except 12:00 AM (midnight) becomes 0000.
The 24-hour system is standard in the US military, aviation, healthcare, public transit, and most of the world outside the US for everyday timekeeping. It's written as four digits with no colon (1430) and spoken as "fourteen thirty." The biggest sources of confusion are the two "12 o'clock" moments: 12:00 AM (midnight) = 0000, and 12:00 PM (noon) = 1200. Using 24-hour time removes the risk of scheduling a meeting or medication 12 hours off — a genuinely dangerous error in medical and operational settings, which is why these fields adopted it.
12:00 AM (midnight) = 0000. 12:00 PM (noon) = 1200. These two are the most common mistakes — midnight is the start of the day (0000), not 2400.
For PM times 1:00–11:59, add 12 to the hour: 3 PM = 1500, 6 PM = 1800, 9 PM = 2100, 11 PM = 2300. AM hours stay the same (except midnight).
1430 = "fourteen thirty." 0800 = "zero eight hundred" or "oh eight hundred." 2000 = "twenty hundred." 0000 = "zero hundred."
Most countries use 24-hour time daily. The US, Canada, Australia, and a few others favor 12-hour AM/PM in civilian life but use 24-hour in military/medical contexts.