How do I convert standard time to military time?

For AM times, just drop the colon and AM — 8:30 AM becomes 0830. For PM times, add 12 to the hour — 3:45 PM becomes 1545 (3+12=15). Midnight is 0000 and noon is 1200. No colon is used in military time.

How do I convert military time to standard time?

For hours 0000-1159, the conversion is straightforward: 0930 is 9:30 AM (just add the colon). For hours 1300-2359, subtract 12 from the hour: 1800 becomes 6:00 PM (18-12=6). 0000 is 12:00 AM (midnight) and 1200 is 12:00 PM (noon).

What is 1500 in military time?

1500 in military time is 3:00 PM. To convert, subtract 12 from the hour: 15 - 12 = 3, so 1500 is 3:00 PM. Military time hours of 1300 through 2359 are all PM times.

What is 0000 in military time?

0000 in military time is 12:00 AM (midnight). It marks the start of a new calendar day. Some military contexts use 2400 to indicate the end of a day (also midnight), but 0000 is the standard start-of-day notation.

What is 1200 in military time?

1200 in military time is 12:00 PM (noon). It is the only hour where military time and standard 12-hour clock show the same number. The next minute is 1201, which is 12:01 PM.

How do you say military time out loud?

Military time is read as a four-digit number. 0800 is said 'zero eight hundred hours.' 1430 is 'fourteen thirty hours.' 0015 is 'zero zero fifteen.' The word 'hours' is often added at the end, and leading zeros are spoken as 'zero,' not 'oh.'

Does the military actually use military time?

Yes. The U.S. military uses the 24-hour clock system universally to eliminate AM/PM ambiguity in orders, schedules, and communications. It is also standard in aviation, emergency services, hospitals, many government agencies, and most countries outside the United States.

What is 2100 in military time?

2100 in military time is 9:00 PM. Subtract 12 from 21 to get 9, so 2100 = 9:00 PM. Similarly, 2000 is 8:00 PM, 2200 is 10:00 PM, and 2300 is 11:00 PM.

What is 0800 military time?

0800 in military time is 8:00 AM. Morning hours (0100 through 1159) convert directly — just add a colon and AM. 0800 = 8:00 AM, 0900 = 9:00 AM, 1000 = 10:00 AM.

Why does the military use 24-hour time instead of AM and PM?

The 24-hour clock eliminates confusion between AM and PM, which can be critical in military operations, medical care, and aviation. Mixing up 6:00 AM and 6:00 PM in an order or schedule can have serious consequences, so the 24-hour format makes every time of day unambiguous.

What are midnight and noon in military time?

Midnight is 0000 (start of day) or sometimes 2400 (end of day). Noon is 1200. These are the two most commonly confused times because standard 12-hour time uses 12:00 AM and 12:00 PM, which feel backwards to many people, while military time is completely unambiguous.

Military Time Converter — CalculatorCove

Hour (1–12)

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Enter the hour in 12-hour format

Minutes (0–59)

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AM or PM

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Converted Time

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Sources & Methodology

✓Conversion rules verified against U.S. Department of Defense timekeeping standards and ISO 8601 international time format specification.

🏛️

ISO 8601 — Date and Time Format Standard

International standard governing 24-hour time notation used globally in military, aviation, and computing contexts

✈️

FAA Air Traffic Control — Time Format Requirements

Federal Aviation Administration rules governing use of 24-hour clock in aviation communications, which parallel military timekeeping

Methodology: Standard to military: For AM times (12:xx AM = 0000, 1–11 AM = 01xx–11xx). For PM times (12:xx PM = 1200, 1–11 PM = 1300–2300). Minutes are appended directly. Military to standard: Hours 00 = 12 AM, 01–11 = 1–11 AM, 12 = 12 PM, 13–23 = subtract 12 to get 1–11 PM.

⏱ Last reviewed: April 2026

How to Convert Military Time to Standard Time

Military time uses a 24-hour clock running from 0000 (midnight) to 2359 (one minute before midnight). Unlike the standard 12-hour clock used in everyday American life, military time never repeats a number — every moment of the day has a unique four-digit designation, which eliminates the AM/PM ambiguity that can cause critical errors in high-stakes environments like the military, aviation, emergency medicine, and international business.

The Conversion Formulas

Standard AM to Military: Hour (12 AM = 00) + Minutes, written as 4 digits

Example: 9:30 AM → 0930 | 12:00 AM (midnight) → 0000 | 11:45 AM → 1145

Standard PM to Military: Hour + 12 (12 PM = 12) + Minutes, written as 4 digits

Example: 3:45 PM → 1545 (3+12=15) | 12:00 PM (noon) → 1200 | 11:00 PM → 2300

Military to Standard: If hour < 12: add AM. If hour = 12: it's 12 PM. If hour > 12: subtract 12, add PM.

Example: 0830 → 8:30 AM | 1200 → 12:00 PM | 1800 → 6:00 PM (18−12=6) | 2355 → 11:55 PM

Complete Military Time Reference Chart

Military	Standard Time	Spoken	Period
0000	12:00 AM (Midnight)	Zero hundred hours	Start of day
0100	1:00 AM	Zero one hundred hours	Early morning
0600	6:00 AM	Zero six hundred hours	Morning
0800	8:00 AM	Zero eight hundred hours	Morning
1200	12:00 PM (Noon)	Twelve hundred hours	Noon
1300	1:00 PM	Thirteen hundred hours	Afternoon
1500	3:00 PM	Fifteen hundred hours	Afternoon
1800	6:00 PM	Eighteen hundred hours	Evening
2000	8:00 PM	Twenty hundred hours	Night
2100	9:00 PM	Twenty-one hundred hours	Night
2300	11:00 PM	Twenty-three hundred hours	Late night
2359	11:59 PM	Twenty-three fifty-nine	End of day

The Tricky Cases: Midnight and Noon

The two times that confuse people most are midnight and noon. In standard time, 12:00 AM is midnight and 12:00 PM is noon — which feels counterintuitive because AM means "before noon" yet 12:00 AM comes after 11:59 PM. Military time cuts through this entirely: midnight is always 0000 and noon is always 1200. No ambiguity possible.

How to Say Military Time Out Loud

Military time is always pronounced as a four-digit number. The word "hours" is typically added at the end. Leading zeros are spoken as "zero," not "oh." Times with non-zero minutes after an even hundred are spoken differently:

0800 — "zero eight hundred hours"
0815 — "zero eight fifteen"
1430 — "fourteen thirty"
2045 — "twenty forty-five"
0000 — "zero hundred hours" or "midnight"

Who Uses Military Time?

Beyond the obvious use in armed forces worldwide, the 24-hour clock is standard in aviation (all flight plans and air traffic control), hospitals and emergency medicine (medical records, drug schedules), international business and communications, most of Europe and Asia for everyday use, railways and public transit timetables in many countries, and computer systems and programming (ISO 8601 standard).

💡 Quick Mental Trick: For PM conversions, the easiest method is to simply add 12 to any PM hour except 12:xx PM (noon), which stays as 1200. So 5 PM becomes 1700, 9 PM becomes 2100, and 11:30 PM becomes 2330. For AM, just use the hour as-is with a leading zero for single-digit hours.

Frequently Asked Questions

For AM times, keep the hour as-is but add a leading zero for single-digit hours — 8:30 AM becomes 0830, and 11:15 AM becomes 1115. The special case is 12:00 AM (midnight), which becomes 0000. For PM times, add 12 to the hour — 3:45 PM becomes 1545, 9:00 PM becomes 2100. The exception is 12:xx PM (noon), which stays as 1200.

For hours 0001 through 1159, these are all AM times — add a colon and AM. For 0000, that's 12:00 AM (midnight). For hours 1200 through 2359, subtract 12 from the hour to get the PM hour. So 1800 becomes 6:00 PM, 1345 becomes 1:45 PM, and 2359 becomes 11:59 PM. The special case is 1200, which is 12:00 PM (noon) — do not subtract 12 from noon.

1500 in military time is 3:00 PM. Subtract 12 from the hour: 15 minus 12 equals 3, so 1500 is 3:00 PM. To extend this: 1530 is 3:30 PM, 1545 is 3:45 PM.

0000 is midnight — 12:00 AM, the very start of a new day. Some contexts also use 2400 to indicate the end of a day, but 0000 is the standard notation for the beginning of a day. The first second after midnight is 0000, and the last minute of the day is 2359.

1200 is 12:00 PM — noon, the middle of the day. It is the only military time hour that equals the same number in standard 12-hour time. The minute after noon is 1201 (12:01 PM), and one hour later is 1300 (1:00 PM).

2100 is 9:00 PM. Subtract 12 from 21 to get 9. Other common evening times: 1900 = 7:00 PM, 2000 = 8:00 PM, 2200 = 10:00 PM, 2300 = 11:00 PM.

Military time is spoken as a four-digit number with "hours" at the end. Leading zeros are said as "zero" (not "oh"). 0800 is "zero eight hundred hours." When there are non-zero minutes, you say both the hours and minutes: 1430 is "fourteen thirty," and 0915 is "zero nine fifteen."

Hospitals use the 24-hour clock because medical care happens around the clock and AM/PM errors can be dangerous. Documenting a medication given at "6:00" without AM/PM could mean a 12-hour delay or double dosing. Military time eliminates that ambiguity completely, making medical records, prescription schedules, and shift handoffs unambiguous.

They use the same number system, but military time has a specific pronunciation convention and omits the colon between hours and minutes (1430 not 14:30). Standard 24-hour time as used in Europe and on digital clocks often includes the colon: 14:30. The math and the hour values are identical — only the written format and pronunciation differ slightly.

The simplest trick: if the military time hour is 13 or higher, subtract 12 to get the PM hour. If it is 12, it is noon. If it is 0000, it is midnight. If it is 01 through 11, it is that hour in the morning. For going the other direction, just remember to add 12 to any PM hour except 12:xx PM.

Midnight is 0000 (start of day) and noon is 1200. These are the two most important and most commonly confused times. Standard time's "12:00 AM" and "12:00 PM" are confusing because 12 AM comes before 1 AM — military time solves this by numbering the hours sequentially, so midnight is unambiguously 0000 and noon is unambiguously 1200.

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