Military Time Chart: 24-Hour Conversion Table

• AM to 24-hour: keep the hour and minutes, with a leading zero if the hour is a single digit (9:30 AM is 0930). 12:xx AM becomes 00xx.
• PM to 24-hour: add 12 to the hour (4:15 PM is 1615). 12:xx PM stays 12xx.
• 24-hour to AM/PM: for 1300 and later, subtract 12 from the hour and add PM (2145 is 9:45 PM).

These rows are the times between the hours: :15 and :45 below, and the half hours in the table after that.

Army Regulation 25–50, paragraph 1–26, gives the range 0001 to 2400, so 2400 is inside that range and 0000 is not. The paragraph says nothing more about midnight. It applies the four-digit format to memorandums: “Civilian time is used when writing letters. Military time is used for memorandums.” This page shows midnight as 0000 as its own display choice, not taken from AR 25–50. The converter accepts 2400 and shows it as 12:00 AM.

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Army Regulation 25–50 is the Army's regulation on preparing correspondence. It says:

This is an Army rule. Other organizations may follow different rules, which this page does not cover.

Reviewed November 2, 2026. The conversions on this page are arithmetic on a 24-hour clock, so they rest on no outside source. Every table row is generated by the same function the converter uses. The one statement about how time is written in correspondence comes from this official Army publication:

• Army Regulation 25–50, Preparing and Managing Correspondence (armypubs.army.mil)