Convert AM/PM (12-hour) time to 24-hour military format and back. Simple but surprisingly often needed for form-filling, coding and international communication.
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How it works
Two independent inputs each parse and reformat their value. "12 PM" is noon (12:00), "12 AM" is midnight (00:00). "1 PM" is 13:00, "11 PM" is 23:00.
Key features
- Bidirectional conversion
- Robust parsing of common formats
- Zero-padded output
Common use cases
Filling forms
Some forms want 24h, some want 12h — this tool makes it painless.
Reading military/aviation time
18:00 = 6 PM.
International communication
Most countries outside the US and UK use 24-hour time exclusively.
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Pro tips
- ◆12 PM = noon, 12 AM = midnight — this trips up almost everyone.
Common mistakes to avoid
- ✕Writing "12 PM" when you mean midnight — always write 00:00 or "midnight" to be safe.
Frequently asked questions
Is there a 25-hour clock?▼
Some Japanese TV schedules use 25:00, 26:00 etc. to mean "1 AM next day", "2 AM next day". Fun trivia!
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