The common “what time is that in military time” question, converted precisely in both directions.
How it works
Converting to 12-hour: the hour is taken modulo 12 (with 0 becoming 12), and AM/PM is assigned based on whether the original hour was before or after noon. Converting to 24-hour: 12 is added to PM hours (except 12 PM itself), and 12 AM becomes 00.
What this does not include
This does not include time-zone shifting — for that, use this site’s time zone converter instead. This tool only reformats a clock time, not shifts it.
How to use this calculator
- Choose a conversion direction and enter the time.
Frequently asked questions
Why does noon (12 PM) stay as 12:00 in 24-hour time?
Because 24-hour time counts from 00:00 at midnight, noon naturally falls at the 12-hour mark without needing the usual “add 12” adjustment PM hours get.
Why does midnight (12 AM) become 00:00, not 12:00?
In 24-hour time, the day starts at 00:00 — 12 AM is the very start of the day, so it maps to hour zero, not hour twelve.
Who commonly uses 24-hour military time?
Military, aviation, healthcare, and many countries outside the US use 24-hour time as the everyday standard, avoiding AM/PM ambiguity entirely.
