Time Converter
12 Hour to 24 Hour Time Converter
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7:30 PM
19:30
Add 12 to PM hours
Quick Answer
To convert PM → 24h: add 12 to the hour (except 12 PM stays 12).
7:30 PM = 19:30 · 12:00 AM = 00:00 · 12:00 PM = 12:00
AM/PM Conversion Rules
Rule 1: AM hours (1-11)
Keep the hour the same. 1:00 AM = 01:00, 11:30 AM = 11:30.
Rule 2: PM hours (1-11)
Add 12 to the hour. 1:00 PM = 13:00, 7:30 PM = 19:30, 11:59 PM = 23:59.
Rule 3: 12 AM (Midnight)
12 AM = 00:00. The “12” becomes “00” — this is the tricky case most people get wrong.
Rule 4: 12 PM (Noon)
12 PM = 12:00. The hour stays 12 — noon is already in 24-hour format.
Common Mistakes
The most frequent mistake is confusing 12 AM and 12 PM. Remember: 12 AM is midnight (00:00), and 12 PM is noon (12:00). Another common error is adding 12 to 12 PM, which would give 24:00 — an invalid time. The hour 12 PM does not need the +12 adjustment.