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Military time (also called 24-hour time) avoids the AM/PM ambiguity of civilian time by numbering hours 00 through 23. This tool converts between 12-hour and 24-hour notation in both directions, and also shows the phonetic "hundred hours" reading used in radio communication.
How it works
For 12-hour to military: AM hours keep the same number (except 12 AM, which becomes 00), and PM hours (except 12 PM) add 12. For military to 12-hour: hours 13-23 subtract 12 to become PM, 00 becomes 12 AM, and 01-12 map directly.
- Enter conversion direction.
- Enter hour (1-12) — for 12-Hour → Military.
- Enter minute (0-59) — for 12-Hour → Military.
- Enter aM/PM — for 12-Hour → Military.
- Enter military time (4 digits, e.g. 1430) — for Military → 12-Hour.
- Click Calculate to see your results.
Examples
Afternoon meeting time
2:30 PM converts to 1430 in military time, read phonetically as "fourteen thirty hours".
Who should use it
- Converting a civilian appointment time into military time for a schedule or logbook.
- Reading military or aviation schedules in familiar 12-hour format.
Industry applications
- Military and defense
- Aviation and logistics
- Healthcare (many hospitals use 24-hour charting)
Advantages
- Both directions supported.
- Includes the phonetic radio-style reading.
Limitations
- Does not handle time zones or UTC offsets — see the Zulu Time Converter for that.
Common mistakes to avoid
- Forgetting that 12 AM is military 0000, not 1200 — and that 12 PM is military 1200, not 0000.
Best practices
- When communicating a time to avoid AM/PM confusion (e.g. scheduling across time zones or shifts), military time notation removes the ambiguity entirely.
Tips
- If you also need to account for a UTC/time zone offset, use the Zulu Time Converter instead — this tool only toggles the 12h/24h display format.