How to use it
- Type a time in either form: 7:45 PM, 7 pm, 12:30 a.m., 1945, 19:45 or 0730.
- Read the military time, the 12-hour time and the way it is commonly said. The chart below lists every hour of the day in both forms.
How it converts
Every time is turned into minutes after midnight and written out both ways. In the 12-hour clock, the 12 o’clock hour is the odd one: 12 AM is the first hour of the day (00 in 24-hour time) and 12 PM the hour after noon (12), while 1 PM to 11 PM are 13 to 23. Mistaking that rule is the usual conversion error.
What we tested
On October 14, 2026 we converted all 1,440 minutes of the day with the page’s own functions and compared the military and 12-hour forms with Python’s datetime formatting, then converted each result back again: every minute matched both ways. We also checked inputs such as “7 pm”, “12:30 a.m.”, “1945 hours” and 2400, and that invalid times such as 24:01, 13 pm and 7:60 are refused. A version that treated 12 AM as noon failed 60 minutes of the test. In Chromium: 7:45 PM showed 1945 and 'nineteen forty-five hours'; 0730 showed 7:30 AM; 12 am showed 0000, midnight, 'zero hundred hours'; 2400 showed 0000 with the end-of-day note; 25:00 showed a message; the 12-row chart rendered; the page fitted a 390 px phone with no errors.
Frequently Asked Questions
Built by Derek Giordano · Part of Ultimate Design Tools