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Military Time Calculator – Convert Standard ↔ 24‑Hour Time

Military Time Converter

The Military Time Calculator converts between standard 12‑hour time (with AM/PM) and 24‑hour military time. Military time is used worldwide by the armed forces, aviation, hospitals, and public transportation because it eliminates the ambiguity of AM and PM. Enter a time like 2:30 PM and get 14:30, or enter 15:45 and get 3:45 PM. The calculator provides a step‑by‑step explanation and includes a complete conversion chart.

24‑Hour Clock000204060810121416182022Hours go from 00 to 23

Military Time Conversion Chart

StandardMilitary
12:00 AM00:00
1:00 AM01:00
2:00 AM02:00
3:00 AM03:00
4:00 AM04:00
5:00 AM05:00
6:00 AM06:00
7:00 AM07:00
8:00 AM08:00
9:00 AM09:00
10:00 AM10:00
11:00 AM11:00
12:00 PM12:00
1:00 PM13:00
2:00 PM14:00
3:00 PM15:00
4:00 PM16:00
5:00 PM17:00
6:00 PM18:00
7:00 PM19:00
8:00 PM20:00
9:00 PM21:00
10:00 PM22:00
11:00 PM23:00
How to Read Military Time Aloud

Military time is spoken as a four‑digit number. For example, 14:30 is “fourteen thirty hours”. 00:00 is “zero hundred hours”. 08:05 is “zero eight oh five hours”. The word “hours” is often added. Minutes are spoken as a two‑digit number.

24-Hour Military Time to Standard 12-Hour Civilian Time Reference Table

Standard Civilian TimeMilitary / 24-Hour FormatSpoken Phonetic ReadingPrimary Professional Application
12:00 AM (Midnight)00:00 / 0000Zero Hundred HoursLogistics start of day
1:00 AM01:00 / 0100Zero One Hundred HoursOvernight medical shift
6:00 AM06:00 / 0600Zero Six Hundred HoursAviation morning departure
12:00 PM (Noon)12:00 / 1200Twelve Hundred HoursMidday operational check
1:00 PM13:00 / 1300Thirteen Hundred HoursAfternoon shift transition
5:00 PM17:00 / 1700Seventeen Hundred HoursEmergency dispatch handover
8:00 PM20:00 / 2000Twenty Hundred HoursEvening medication round
11:00 PM23:00 / 2300Twenty-Three Hundred HoursFinal flight landing

Common Mistakes When Converting Military Time

  • Forgetting the leading zero: 1:00 AM is 0100, not 100.
  • Using 24:00: Midnight is 00:00, not 24:00 (though some use 24:00 for end of day).
  • Misconverting 12:00 PM: 12:00 PM is 12:00, not 00:00.
  • Adding 12 to 12:00 AM: 12:00 AM becomes 00:00 (subtract 12).

Real‑World Examples

  • Flight schedules: Departure at 15:45 means 3:45 PM.
  • Hospital shift change: 07:00 → 7:00 AM, 19:00 → 7:00 PM.
  • Train timetables: 00:15 → 12:15 AM (just after midnight).

Use this military time calculator for travel planning, shift scheduling, or learning the 24‑hour clock. The step‑by‑step explanation and the included chart make it easy for anyone to master the conversion.

Quick Manual Conversion Example

Convert 8:15 PM to military time:

8:15 PM → hour 8 is PM → add 12 → 20:15 military.

Convert 03:45 military to standard:

03:45 → hour 3 is AM → 3:45 AM.

Frequently Asked Questions about Military Time

What is military time and why is a conversion chart useful?
Military time is a 24-hour time system running from midnight (00:00) to midnight (24:00/00:00). A military time chart allows instant visual lookup between 12-hour AM/PM civilian times and 24-hour military notation.
How do I calculate military time from standard PM time?
Add 12 to any PM hour from 1:00 PM to 11:59 PM (e.g. 5:30 PM + 12 = 17:30 / 1730). Noon (12:00 PM) remains 12:00.
How do I calculate military time from standard AM time?
For 1:00 AM through 11:59 AM, keep the hour as is and add a leading zero if under 10 (e.g. 7:45 AM = 07:45 / 0745). Midnight (12:00 AM) becomes 00:00 / 0000.
Why do emergency services, aviation, and hospitals use 24-hour military time?
24-hour military time prevents life-threatening ambiguities between AM and PM in medical prescriptions, flight departure clearance, emergency dispatch, and military operations.
How do you pronounce military time hours out loud?
0800 = 'Zero Eight Hundred Hours'. 1545 = 'Fifteen Forty-Five Hours'. 0000 = 'Zero Hundred Hours'.
What is 24:00 vs 00:00 in military time charts?
00:00 designates the beginning of a calendar day (midnight start). 24:00 designates the exact end of a calendar day (midnight finish).
Do I put a colon in military time (14:30 vs 1430)?
US military and emergency services write military time without colons (1430). International standards (ISO 8601) and civilian 24-hour clocks use colons (14:30). Our tool supports both formats.
What are NATO phonetic time zone suffixes?
Global military operations add NATO letter codes for time zones: 'Z' for Zulu time (UTC/GMT), 'L' for Lima time (Local time), and 'R' for Romeo time.