Free military time calculator

What is military time?

Military time is the 24-hour clock: a way of telling time that runs straight from 0 to 23 hours instead of looping through 1–12 twice a day. It is written as a four-digit number with no colon and no AM or PM — the first two digits are the hour (00–23) and the last two are the minutes (00–59). So 9:30 in the morning is 0930 and 9:30 at night is 2130. Because every time of day has exactly one four-digit code, there is never any doubt about whether you mean morning or evening — which is the whole point of the system, and what this military time converter does for you in a single click.

The 24-hour clock is the international standard for telling time; in the United States the same system is most associated with the armed forces, which is why Americans call it 'military time.' Most of the rest of the world simply calls it the 24-hour clock and uses it for everyday schedules, transport timetables, and digital displays.

How to convert military time to standard time

There are only two rules to remember when reading military time, plus two special cases for midnight and noon. The converter above applies all of them instantly, but here is the logic it follows so you can do it in your head.

Military (24-hour) to standard (12-hour) time

1. 0000 to 1159 — keep the time, add AM. The morning hours are almost identical: 0815 is 8:15 AM. The one twist is the midnight hour, which is written 00 but spoken as 12 AM (0030 is 12:30 AM).
2. 1200 — that is noon, 12:00 PM. The only hour where 12 stays 12.
3. 1300 to 2359 — subtract 12, add PM. For any hour from 13 onward, take away 12 and tack on PM: 1700 − 12 = 5:00 PM, and 2245 − 12 = 10:45 PM.

Standard (12-hour) to military (24-hour) time

1. 12:xx AM — change 12 to 00. Midnight and the hour after it become 00: 12:30 AM is 0030.
2. 1 AM to 11 AM — keep the hour, drop the AM. Just pad to two digits: 7:05 AM is 0705.
3. 12:xx PM — keep 12. Noon stays 1200.
4. 1 PM to 11 PM — add 12. 3:45 PM becomes 15:45, written 1545.

A worked example using the military time converter

Step 1 — Split the four digits into hours and minutes

Read 1830 as two pairs: the hour is 18 and the minutes are 30. The minutes never change, so the answer will end in :30.

Step 2 — Is the hour above 12?

18 is greater than 12, so this is a PM time. Subtract 12: 18 − 12 = 6.

Step 3 — Add the PM label

Put the pieces together: 6, the :30 minutes that carried across, and PM. So 1830 is 6:30 PM. Spoken aloud, 1830 is 'eighteen thirty.'

Military time chart — the full 24-hour clock

Most people want the whole picture, not just one number. The chart below lists every hour of the 24-hour clock beside its standard 12-hour equivalent and how it is spoken aloud. Find the time on the left and read across — this is the reference table competitors usually split across two pages or hide behind an ad.

The 24-hour clock on the hour. Add minutes by reading the last two digits normally — 1345 is 'thirteen forty-five,' 1:45 PM.

How to read and say military time

Saying military time aloud follows its own short rulebook. For a time on the hour, say the four-digit number and add the word 'hundred': 1400 is 'fourteen hundred,' 0600 is 'zero six hundred.' Note that the leading zero on a single-digit hour is spoken as 'zero' (or sometimes 'oh'), so 0900 is 'zero nine hundred.'

When there are minutes, you do not say 'hundred' — you read the hour pair and then the minute pair: 1430 is 'fourteen thirty,' and 2115 is 'twenty-one fifteen.' Minutes under ten keep their leading zero, spoken as 'zero': 1305 is 'thirteen zero five.' Many people append the word 'hours' for clarity — 'fourteen hundred hours' — though it is optional.

One small style point splits people: the leading zero on single-digit hours. In strict military usage it is spoken as 'zero' (0700 is 'zero seven hundred'), but in casual American English you will often hear 'oh' instead — 'oh seven hundred,' the same way phone numbers turn 0 into 'oh.' Both are understood; 'zero' is the by-the-book version. Seconds, by the way, almost never appear in everyday military time — the four-digit HHMM format stops at the minute. When seconds matter, as in precise logs, they are simply added on the end (e.g. 143015 for 14:30 and 15 seconds), but that is the exception, not the rule.

Midnight and noon: 0000, 2400, and 1200

The two times that trip people up are midnight and noon, because that is where the 12 and the 24-hour systems disagree most.

Noon is the easy one: 12:00 PM is 1200 ('twelve hundred'). The 12 stays put. The mistake to avoid is writing noon as 0000 — that is midnight, the opposite end of the day.

Midnight can be written two ways: 0000 or 2400. The ISO 8601 international standard recognises both but prefers 0000, because it marks the start of a new day. By convention, 0000 is used when midnight begins a day or event ('the shift starts at 0000'), while 2400 marks midnight as the end of a day ('the shift ends at 2400'). They point to the same instant; 0000 looks forward, 2400 looks back. On the 12-hour clock both are 12:00 AM.

Where military time is used: military, medical, and aviation

The 24-hour clock is used anywhere a one-hour mix-up between morning and evening could cause real harm. Removing AM and PM removes that risk entirely, which is why these fields adopted it long ago.

• The armed forces. Orders, logs, and operations are timestamped in 24-hour time so 'attack at 6' can never be confused between 0600 and 1800. This is the usage that gave the system its American nickname.
• Healthcare and nursing. Hospitals chart medication times, vital signs, and shift handovers in 24-hour time. A dose recorded at 0800 versus 2000 is a twelve-hour, potentially dangerous difference — the colon-free 24-hour format closes that gap.
• Aviation and transport. Pilots, air-traffic control, and rail and bus timetables use the 24-hour clock (often in UTC) so flight and departure times read the same worldwide regardless of local AM/PM habits.
• Emergency services, IT, and science. Dispatch logs, server timestamps, and lab records all favour the unambiguous 24-hour format for the same reason: precise, sortable, mistake-proof times.

Why is it called military time?

The name is an Americanism. The 24-hour clock is the civilian standard across most of the world, but in the United States, where the 12-hour clock dominates daily life, the 24-hour format is most visibly used by the armed forces — so 'military time' became the everyday label for it.

Militaries adopted it for clarity: in operations, a misread time can be costly, and a four-digit code that runs 0000–2359 removes the AM/PM ambiguity completely. Outside the US, the same system is simply called the '24-hour clock' and carries no military connotation at all — it is just how clocks, schedules, and timetables are written across most of Europe, Asia, and Latin America.

Worth knowing: 'military time' in the strict sense often pairs the 24-hour clock with a time-zone letter — Zulu time (Z) is the military name for UTC/GMT, so '1300Z' means 1:00 PM UTC regardless of where you are. For everyday conversion you can ignore the zone letter; the 0000–2359 number is all you need to read the clock. This converter handles that number only — it never reads your device's clock or timezone, so the result depends entirely on the time you type.

Common military time mistakes

• Adding 12 to morning hours. Only PM times (1 PM onward) get +12. 8:00 AM is 0800, not 2000.
• Writing noon as 0000. Noon is 1200. 0000 is midnight — the start of the day, not the middle.
• Forgetting the leading zero. 5:00 AM is 0500, not 500. Military time is always four digits.
• Saying 'hundred' when there are minutes. 1330 is 'thirteen thirty,' not 'thirteen hundred thirty.' 'Hundred' is only for on-the-hour times.
• Subtracting 12 from 12 PM. Noon stays 1200; only hours of 13 and above get the −12 treatment.

Sources and methodology

Conversions follow the standard 24-hour clock rules used worldwide: morning hours map across unchanged, noon is 1200, and PM hours from 1 PM add 12. The midnight convention — 0000 preferred for the start of a day, 2400 accepted for the end — follows the ISO 8601 international standard for date and time representation. Every conversion in this tool is computed exactly from the hour and minute you enter; no clock, date, or timezone is read from your device.

Calculators that work alongside the military time

These pair naturally with this one for decisions that sit nearby.

Frequently asked questions about the free military time calculator

About this military time converter

This military time converter runs entirely in your browser. The time you type never leaves your device — nothing is sent to a server, logged, or shared. It applies the standard 24-hour clock rules (0000–1159 AM, 1200 noon, 1300–2359 subtract 12 for PM) and updates instantly on every change. No clock, date, or timezone is read from your device.

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