Military Time Converter: Standard to 24-Hour

Times that are not on the clock are rejected. 2460 fails because the minutes are 60, and 1275 fails because the minutes are 75. The hour must be 00 to 23 and the minutes 00 to 59.

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.

For the 0000 row, see the midnight explanation above.

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)