Military Time Converter

What Is the Military Time Converter?

This tool converts a time between 12-hour clock notation (with AM/PM) and 24-hour "military" notation, in either direction -- useful when reading schedules, logs, or international timestamps that use the format you're less familiar with.

How to Use This Calculator

Choose a conversion direction, then enter the time in the matching format (hour/minute/AM-PM for 12-hour, or a single 24-hour time field). The result shows the converted time in the other format.

How the Conversion Works

Worked Example

Practical Uses

• Reading a 24-hour schedule, itinerary, or log file in familiar AM/PM terms
• Converting a civilian time into military/24-hour format for logs or forms
• Avoiding AM/PM entry mistakes on international forms that expect 24-hour time

To convert a time between two time zones instead of two notations, see the Time Zone Converter.

Step-by-Step: Converting in Either Direction

Choose the direction first. For 12-hour to 24-hour, enter the hour, the minute, and select AM or PM. For 24-hour to 12-hour, enter the single 24-hour time. The result shows both notations so you can copy whichever you need, for example 14:30 alongside 2:30 PM. The tool reports the minutes unchanged, since only the hour part differs between the two systems.

Worked Examples Across the Day

A quick set of hypothetical conversions: 12:05 AM becomes 00:05, 9:40 AM becomes 09:40, 12:15 PM stays 12:15, 6:20 PM becomes 18:20, and 11:59 PM becomes 23:59. Going backward, 00:45 is 12:45 AM, 13:10 is 1:10 PM, and 22:00 is 10:00 PM. Notice that the PM hours from 1 to 11 always gain twelve, while the noon hour and the midnight hour are the two special cases.

A Fast Mental Method

For an afternoon or evening 24-hour time, subtract 12 from the hour to get the PM hour, so 19:00 is 7:00 PM. For an hour from 1 to 11 in the morning, the number is the same in both systems, only the AM label appears. Memorize the two exceptions and the rest is easy: 12 AM is 00, and 12 PM is 12. When writing 24-hour times, most sources use a leading zero for hours under 10, such as 08:30.

Common Mistakes

• Writing 24:00 or 12:00 AM inconsistently for midnight. Which one to use at the end of a day depends on the convention of the document or system. Check the format your form or schedule requires, since 24:00 is sometimes used to mean the end of a day and 00:00 the start of the next.
• Mixing AM and PM at noon and midnight. Many people say 12 PM is midnight; it is noon. Add the date and use 24-hour time when the difference matters, such as an overnight flight or medication schedule.
• Reading 24-hour times as decimal hours. 14:30 means half past two, not 14.3 hours. For payroll decimals use a duration tool instead.
• Forgetting that this changes only notation. It does not change the time zone, so 14:30 in one city is not the same moment as 14:30 elsewhere.

Where the 24-Hour Format Helps

The 24-hour clock is widely used in transport timetables, healthcare charts, logs, and technical timestamps because it removes any AM or PM ambiguity. Converting into it before filling out a form or entering a schedule reduces the chance of a mistake with a date-critical entry. Some organizations and regions use a colon-free style such as 1430 or add the word hours when spoken, so match the convention of whoever will read it.

Frequently Asked Questions