Military time runs the day from 0000 to 2359 with no AM, no PM and no ambiguity — which is why hospitals, airlines, emergency services and the armed forces refuse to work in anything else. This Military Time Converter switches any time between the 24-hour military format and the ordinary 12-hour clock in both directions, and shows how the result is spoken.
Worked Example: 1345 Hours
The conversion rule for the afternoon is a single subtraction: any military hour above 12 loses 12 and gains a PM. So 1345 = 1:45 PM, spoken as “thirteen forty-five.” The morning needs no surgery at all — 0845 is 8:45 AM, read “zero eight forty-five” — and the two hinges of the day deserve their own memorization because they break the pattern. Midnight is 0000 (“zero hundred hours”) at the start of the day, and the same instant closing the day is written 2400 in scheduling contexts; both are 12:00 AM on the civilian clock, and confusing which date a 0000 belongs to is the one genuinely dangerous military-time error (a medication due “at 0000 on the 15th” is the first minute OF the 15th, the night that begins after the 14th’s evening). Noon is 1200 = 12:00 PM, “twelve hundred hours,” the hinge where AM flips — the civilian clock’s strangest feature is that 12 PM is noon and 12 AM is midnight, with neither 12 behaving like the numbers around it, and military time exists largely to delete that paragraph from operational life. The reverse conversion mirrors the rules: PM times (except 12 PM) add 12 — 1:45 PM → 1345 — AM times (except 12 AM) keep their hour with a leading zero, and 12 AM folds to 00. Two conversions, four hinges, zero ambiguity: that is the entire system.
Speaking and Writing the Format Like a Native
Military time is a spoken language as much as a written one, and its conventions are precise. Hours are always four digits with the leading zero pronounced: 0600 is “zero six hundred,” 0930 is “zero nine thirty,” and the minutes ride along without the word “hundred” splitting them (1345 is “thirteen forty-five,” not “thirteen hundred forty-five”). The suffix “hours” follows in formal and radio usage — “zero six hundred hours” — partly as a checksum: hearing the word tells the listener the number was a time, not a grid reference or a quantity. Zulu time (the item this page also serves) is military time pinned to UTC and suffixed Z — “1400Z” — the standard in aviation and international operations so that a flight plan read in Tokyo and Texas names the same instant; local military time and Zulu diverge by the base’s UTC offset, and confusing them is the civilian 0000-date error wearing a second costume. Written civilian-military hybrids to avoid: a colon (13:45 is the 24-hour civilian style — European timetables, ISO timestamps — while strict military style omits it: 1345), and any AM/PM garnish, which signals the writer wanted the aesthetic without the system. This converter accepts the hour-and-minutes numerically and returns both written styles plus the spoken form, because reading a schedule and saying it correctly on a radio or a ward round are different competencies and both are trainable here.
Why Hospitals, Airlines and Dispatchers Insist on It
The case for 24-hour time is an error-rate argument. On the 12-hour clock, every time is ambiguous by twelve hours unless its suffix survives transmission — and suffixes are exactly what get dropped in shouted handovers, smudged handwriting and truncated messages. A medication charted for “6:00” without its AM/PM is a coin-flip with a patient attached; charted 0600 or 1800, it cannot be misread by anyone awake. Aviation builds the same defense into flight plans and weather reports, where a twelve-hour error is a missed slot or worse; railways and European public life run 24-hour timetables natively, which is why the format feels “military” mainly in the United States — elsewhere it is simply the clock. The conversion skill matters most at interfaces: the civilian world handing a time to an operational one (a family told to arrive for surgery at “0530,” a traveller decoding a 1845 departure), and software, where timestamps, logs and medical devices speak 24-hour by default and humans must translate without slipping a half-day. Practice the two hinges (midnight and noon) and the PM subtraction until they are reflexes, and the remaining twenty-two hours convert themselves.
The 24-Hour World Beyond the Military
The “military” label is an Americanism: most of the planet’s civilian life already runs on the 24-hour clock, and the converter serves travellers as much as soldiers. European rail and air timetables print 24-hour times natively — a 17:40 departure from Frankfurt needs no conversion for a German reader and exactly one subtraction (17 − 12) for an American one — and the ISO 8601 standard writes international timestamps in 24-hour form with the date attached (2026-10-22T13:45), the format of every server log, flight record and medical device on earth. Hospital dosing schedules show the conversion doing clinical work: an order for medication “q6h” (every six hours) starting at 0600 generates the sequence 0600, 1200, 1800, 0000 — four unambiguous instants where the 12-hour equivalents (6 AM, 12 PM, 6 PM, 12 AM) invite the two hinge errors this page exists to prevent. Practice consolidates fastest on anchors from your own day: 0600 is reveille and the early shift (6 AM); 1200 is lunch (12 PM); 1800 is the evening handover (6 PM); 2200 is lights-out on base and the late news at home (10 PM). Drill those four, add the rule (subtract 12 after noon, fold 12 AM to 00), and the remaining hours interpolate themselves — which is how every nurse, dispatcher and sailor actually learned the system: not as 24 facts, but as four anchors and one rule, checked against a converter until the checking became unnecessary.
Converting a Whole Shift Pattern
Real fluency shows on schedules, not single times, so run a standard three-shift rotation through the rules. Days work 0600–1400 (6:00 AM to 2:00 PM — no subtraction needed at the start, one at the end: 14 − 12 = 2). Swings work 1400–2200 (2:00 PM to 10:00 PM — both ends subtract). Nights work 2200–0600 (10:00 PM to 6:00 AM), the pattern that crosses the midnight hinge and teaches the one scheduling truth the 12-hour clock hides: the night shift’s “tomorrow morning” end belongs to the next date, and its eight hours span two calendar days’ labels while remaining one continuous shift. Each pattern is eight hours, each converts with the same single rule, and a roster written in military time can be scanned for overlaps and gaps at a glance — no suffixes to lose, no hinges to trip on. That glanceability, multiplied across every roster, chart and flight plan in the building, is the entire return on the format’s small learning curve.
Timestamps, Seconds and the 24:00 Convention
Two refinements complete the system for anyone meeting it in data rather than on a roster. First, the full international timestamp welds date and 24-hour time into one sortable string — 2026-10-22T13:45:00 — where the T separates the halves and every field is fixed-width, which is why databases, logs and flight recorders sort correctly as raw text while 12-hour strings scramble. Second, the end-of-day instant has a licensed double identity: ISO 8601 permits 24:00 to mean the midnight that closes a date, the mirror of the 0000 that opens the next one — timetables and leases use it to keep an event on the date it belongs to (“open until 24:00 on Friday”). Military practice prefers 0000 with the date stated, but meeting 24:00 in the wild should now read as a deliberate choice rather than an error, and converting it is simple: it is 12:00 AM at the end of the named day.
Common Mistakes
Reading 1345 as 3:45 (the subtraction is 13 − 12 = 1, not a digit shuffle). Calling noon 0000 or midnight 1200 — the hinges are midnight 0000 = 12 AM, noon 1200 = 12 PM. Adding 12 to 12 PM or failing to fold 12 AM to 00 in the reverse direction. Forgetting the leading zero when writing morning times (800 instead of 0800), which reads as eight hundred of something else. And pronouncing 1345 with a colon’s pause or an “hours” in the middle — the spoken form is a single unbroken phrase, “thirteen forty-five.”
Related Tools
Continue with the Roman Numerals Converter, the Time to Decimal Calculator, the Days Between Dates Calculator, or browse the full Conversion Calculators hub.
Frequently Asked Questions
What is 1345 in regular time?
1:45 PM. For any military hour over 12, subtract 12 and mark it PM: 13 − 12 = 1. Minutes never change.
How do I convert 1:45 PM to military time?
Add 12 to the hour for PM times: 1 + 12 = 13, giving 1345. AM times keep their hour (with a leading zero), except 12 AM, which becomes 00.
What is midnight in military time?
0000 at the start of the day (spoken “zero hundred hours”), equivalent to 12:00 AM. The same instant ending a day is sometimes written 2400 in schedules — the date a 0000 falls on is the day just beginning.
What is noon in military time?
1200 — “twelve hundred hours” — equivalent to 12:00 PM. Noon is the AM/PM hinge: hours after it are PM on the civilian clock and simply keep counting in military time.
What does Zulu time mean?
Military time referenced to UTC, written with a Z suffix (1400Z). Aviation and international operations use it so every base reads the same instant regardless of local time zones.
Do you write a colon in military time?
Strict military style: no — 1345. The colon form (13:45) is the civilian 24-hour style used on European timetables and in ISO timestamps. Both mean the same instant; the converter shows the military form.