12 / 24-Hour Time Converter
Instantly convert between 12-hour AM/PM and 24-hour (military) time formats. No calculations needed — just type and see.
1–12
0–59
AM / PM
24-Hour Result
How to convert 12-hour to 24-hour time
Select the 12h AM/PM → 24h tab, enter the hour (1–12), minute (0–59), and whether it's AM or PM. The 24-hour result updates instantly.
To go the other way, select 24h → 12h AM/PM and enter hours (0–23) and minutes.
Conversion rules & examples
Quick reference
12:00 AM→00:00Midnight — start of day12:30 AM→00:30Half past midnight01:00 AM→01:0011:59 AM→11:59Just before noon12:00 PM→12:00Noon01:00 PM→13:0006:30 PM→18:3011:59 PM→23:59Last minute of dayPrivacy — runs in your browser
All conversions happen instantly in your browser. No data is uploaded. No signup required.
Frequently Asked Questions
Is midnight 12 AM or 12 PM?
Midnight is 12:00 AM and converts to 00:00 in 24-hour format. Noon is 12:00 PM and stays 12:00 in 24-hour format. This is one of the most confusing parts of 12-hour time.
What is military time?
24-hour time is often called "military time" in the US. It runs from 00:00 (midnight) to 23:59 (11:59 PM), unambiguously representing each minute of the day.
How do I convert PM hours to 24-hour?
Add 12 to the hour for any PM time except 12 PM. So 1:00 PM = 13:00, 6:30 PM = 18:30, 11:45 PM = 23:45. For 12:xx PM, keep it as 12:xx.