Conversor de Horário Militar
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
12 AM = 00:00 ; 12 PM = 12:00
About this calculator
The Military Time Converter is a practical tool to convert times from the 12-hour format (AM/PM) to the 24-hour format, also known as military time. The conversion follows a simple rule: for times between 1:00 AM and 11:59 AM, keep the same numbers but add a leading zero for hours 1 to 9. For times between 1:00 PM and 11:59 PM, add 12 to the hour. For example, 1:00 PM becomes 13:00. Special cases are 12:00 AM (midnight), which equals 00:00, and 12:00 PM (noon), which equals 12:00.
This calculator is useful in many everyday situations, such as understanding flight, train, or military event schedules, or when using systems that adopt the 24-hour format, like digital clocks, calendar apps, or logistics software. Professionals in aviation, healthcare, transportation, and security often need to convert times to avoid confusion between AM and PM. Additionally, travelers dealing with different time zones can benefit by quickly converting departure and arrival times.
When using the converter, remember that the 24-hour format does not use AM or PM. Times from midnight (00:00) to 11:59 are considered AM, while from 12:00 to 23:59 are PM. A common mistake is confusing 12:00 AM with noon; actually, 12:00 AM is midnight. Another caution: when entering hours, ensure the value is between 1 and 12 for the 12-hour format, and minutes are between 0 and 59. The tool accepts inputs like '1:30 PM' or '13:30' and provides instant conversion.
The converter is especially useful for those working with night shifts, as times like 12:00 AM to 5:00 AM can be easily converted to 00:00 to 05:00. Students learning about time zones or time systems can also use it as an educational aid. Note that the conversion is purely mathematical and does not consider seconds, only hours and minutes. For accuracy, always ensure the AM/PM period is correctly selected.
Frequently asked questions
How do I convert 12:00 AM to military time?
12:00 AM equals 00:00 in 24-hour format. It is midnight.
Can I convert times with seconds?
No, the converter only works with hours and minutes. Seconds are not considered.
What does military time mean?
It is the 24-hour format used by armed forces and many countries, ranging from 00:00 to 23:59, without AM or PM.
What is the difference between 12:00 PM and 12:00 AM?
12:00 PM is noon (12:00), while 12:00 AM is midnight (00:00).
Do I need to type the colon?
Yes, the expected format is 'HH:MM' followed by AM or PM. For example, '1:30 PM'.