Military Time Converter
Convert between 24-hour (military) and 12-hour (AM/PM) time
24-Hour to 12-Hour
12-Hour to 24-Hour
Military Time Chart
| 12-Hour | 24-Hour | 12-Hour | 24-Hour |
|---|---|---|---|
| 12:00 AM | 00:00 | 12:00 PM | 12:00 |
| 1:00 AM | 01:00 | 1:00 PM | 13:00 |
| 2:00 AM | 02:00 | 2:00 PM | 14:00 |
| 3:00 AM | 03:00 | 3:00 PM | 15:00 |
| 4:00 AM | 04:00 | 4:00 PM | 16:00 |
| 5:00 AM | 05:00 | 5:00 PM | 17:00 |
| 6:00 AM | 06:00 | 6:00 PM | 18:00 |
| 7:00 AM | 07:00 | 7:00 PM | 19:00 |
| 8:00 AM | 08:00 | 8:00 PM | 20:00 |
| 9:00 AM | 09:00 | 9:00 PM | 21:00 |
| 10:00 AM | 10:00 | 10:00 PM | 22:00 |
| 11:00 AM | 11:00 | 11:00 PM | 23:00 |
Frequently Asked Questions
Military Time – The Complete Guide to the 24-Hour Clock
Military time, also known as the 24-hour clock, is a timekeeping system that counts hours from 00 to 23 instead of splitting the day into two 12-hour halves with AM and PM labels. Originally adopted by militaries worldwide to prevent costly miscommunication, it is now the standard in healthcare, aviation, emergency services, logistics, and most countries outside the United States. Understanding military time is a practical skill that removes ambiguity and prevents errors in scheduling, record-keeping, and communication.
Who Uses Military Time?
The 24-hour clock is far more widespread than many Americans realize. The following industries and regions rely on it as their primary time format:
- Armed forces worldwide: The US military, NATO, and virtually every other military organization use the 24-hour clock. Orders, operations, and logistics depend on unambiguous time references. Saying “0600” leaves no room for confusion between 6 AM and 6 PM.
- Hospitals and healthcare: Medication schedules, surgical records, patient charts, and nursing handoffs use 24-hour time to prevent dosing errors. A medication ordered for “08:00” can never be mistaken for 8 PM.
- Aviation: Pilots, air traffic controllers, and airline schedules worldwide use the 24-hour clock in conjunction with UTC (called “Zulu time” in aviation). Flight plans, METAR weather reports, and NOTAMs all reference Zulu time.
- Emergency services: Police, fire departments, and EMS use 24-hour time in dispatch logs, incident reports, and radio communications.
- Europe, Latin America, Asia, and Africa: Most countries outside the US, Canada, and Australia use the 24-hour clock in daily life—on train schedules, TV listings, store hours, and digital devices.
- Computing and technology: ISO 8601, the international standard for date and time representation, uses the 24-hour format (e.g., 2024-03-15T14:30:00).
Quick Conversion Formula
12-hour to 24-hour (PM hours): Add 12 to the hour
Example: 3:45 PM → 3 + 12 = 15 → 15:45
24-hour to 12-hour (hours 13–23): Subtract 12 from the hour, add PM
Example: 20:15 → 20 − 12 = 8 → 8:15 PM
Special cases:
12:00 AM (midnight) = 00:00
12:00 PM (noon) = 12:00
Complete 24-Hour to 12-Hour Conversion Table
| Military Time | Standard Time | Military Time | Standard Time |
|---|---|---|---|
| 0000 | 12:00 AM (midnight) | 1200 | 12:00 PM (noon) |
| 0100 | 1:00 AM | 1300 | 1:00 PM |
| 0200 | 2:00 AM | 1400 | 2:00 PM |
| 0300 | 3:00 AM | 1500 | 3:00 PM |
| 0400 | 4:00 AM | 1600 | 4:00 PM |
| 0500 | 5:00 AM | 1700 | 5:00 PM |
| 0600 | 6:00 AM | 1800 | 6:00 PM |
| 0700 | 7:00 AM | 1900 | 7:00 PM |
| 0800 | 8:00 AM | 2000 | 8:00 PM |
| 0900 | 9:00 AM | 2100 | 9:00 PM |
| 1000 | 10:00 AM | 2200 | 10:00 PM |
| 1100 | 11:00 AM | 2300 | 11:00 PM |
How to Say Military Time (Phonetic Pronunciation)
In military and aviation contexts, times are spoken in a specific format. Hours are always given as four digits, and the word “hours” is appended. Here are the conventions:
- 0000: “Zero-zero-zero-zero hours” or “Zero hundred hours”
- 0130: “Zero-one-thirty hours”
- 0600: “Zero-six-hundred hours”
- 0900: “Zero-nine-hundred hours”
- 1200: “Twelve hundred hours”
- 1345: “Thirteen-forty-five hours”
- 1800: “Eighteen hundred hours”
- 2359: “Twenty-three-fifty-nine hours”
Example: Converting Common Times
Your shift starts at 7:30 AM: In military time, this is 0730. Say: “Zero-seven-thirty hours.”
A meeting is scheduled for 2:15 PM: Add 12 to 2 = 14. Military time: 1415. Say: “Fourteen-fifteen hours.”
A flight departs at 11:45 PM: Add 12 to 11 = 23. Military time: 2345. Say: “Twenty-three-forty-five hours.”
Common Mistakes to Avoid
- Confusing 12:00 AM and 12:00 PM: Midnight is 00:00 (not 12:00 or 24:00 in standard usage). Noon is 12:00. The 12-hour system’s biggest flaw is the ambiguity at these two points—the 24-hour clock eliminates it.
- Adding 12 to AM hours: Only add 12 to PM hours (1:00 PM through 11:59 PM). For AM hours, the military time is the same number with a leading zero if needed (e.g., 9:00 AM = 09:00).
- Using “24:00” casually: While ISO 8601 allows 24:00 to represent the end of a day, in practice most systems and military usage begin the new day at 00:00. Avoid using 24:00 unless you are specifically referencing the end of a period.
- Forgetting the leading zero: Military time always uses four digits. Write 09:00, not 9:00. In spoken military time, always pronounce the leading zero (“zero-nine-hundred”).
Mental Shortcuts for Fast Conversion
If you struggle with the math, try these shortcuts:
- The “subtract 2, drop the 1” trick: For hours 13–23, subtract 2 from the last digit and drop the leading 1. For 15:00: 5 − 2 = 3 → 3:00 PM. For 21:00: 1 − 2 = −1 → use 9 → 9:00 PM. This works because subtracting 12 is the same as subtracting 10 and then 2.
- Anchor points: Memorize a few key conversions and work from there. Most people know that 18:00 = 6:00 PM. From 18:00, add or subtract hours: 17:00 = 5 PM, 19:00 = 7 PM, 20:00 = 8 PM.
- The “after noon” rule: If the hour is 13 or higher, it’s PM and you subtract 12. If it’s 12 or lower, it’s either AM or noon—just use the number as-is.
Military Time in Practice
In addition to the military and healthcare settings described above, the 24-hour clock appears in everyday life more than you might think. European train timetables, airline boarding passes, digital watches, microwave ovens, and most computer operating systems default to or support the 24-hour format. Learning to read it fluently opens up smoother travel, clearer communication with international colleagues, and fewer scheduling mishaps.