How to use this tool
- Enter a 24-hour clock value or a standard time with AM/PM.
- Read both notations for that same time of day.
- Use the to-standard and to-military sections below for the conversion rules and the full hourly table.
Formula
For a PM hour other than twelve, add twelve to obtain the 24-hour hour. For 12 AM use zero, and for 12 PM keep twelve. In reverse, hours above twelve subtract twelve and use PM; zero becomes 12 AM.
Worked examples
An eight-hour duration is independent of clock notation
Schedule: 8:00 of net worked time. The engine calculates 8:00 (8.00 hours).
Regular: 8:00 (8.00 h); overtime: 0:00 (0.00 h); double time: 0:00 (0.00 h). At $24.00 per hour, estimated gross pay is $192.00.
Military time to standard time converter
A military-style time identifies a clock reading from 00:00 through 23:59. To read 18:45 in standard notation, subtract twelve from the hour and keep the minutes, producing 6:45 PM. The minute component never changes between the two formats. Midnight is 00:00 or 12:00 AM, while noon is 12:00 or 12:00 PM. These two twelve-o’clock cases are worth checking separately because the usual add-or-subtract-twelve shortcut can otherwise be misleading.
12 hour to military time converter
For a morning time from 1 AM through 11 AM, keep the hour and add a leading zero when needed. For an afternoon or evening time from 1 PM through 11 PM, add twelve to the hour. Compact notation such as 2130 describes 21:30, but 21.30 decimal hours is a different kind of value. Use the time-card tool for elapsed work hours rather than subtracting printed four-digit clock values as ordinary numbers.
Use the table as a clock reference
Each row in the hourly table represents the same moment in two notations, not a duration or an amount of pay. Match the hour first, then carry over the original minutes unchanged. For example, the row for 18:00 also tells you that 18:25 uses the six-o’clock PM hour. The table begins at midnight and ends at 23:00; use 00:00 for the next midnight rather than treating 24 as an ordinary input hour.
24-hour military time table
| Military time | Standard time |
|---|---|
| 00:00 | 12:00 AM |
| 01:00 | 1:00 AM |
| 02:00 | 2:00 AM |
| 03:00 | 3:00 AM |
| 04:00 | 4:00 AM |
| 05:00 | 5:00 AM |
| 06:00 | 6:00 AM |
| 07:00 | 7:00 AM |
| 08:00 | 8:00 AM |
| 09:00 | 9:00 AM |
| 10:00 | 10:00 AM |
| 11:00 | 11:00 AM |
| 12:00 | 12:00 PM |
| 13:00 | 1:00 PM |
| 14:00 | 2:00 PM |
| 15:00 | 3:00 PM |
| 16:00 | 4:00 PM |
| 17:00 | 5:00 PM |
| 18:00 | 6:00 PM |
| 19:00 | 7:00 PM |
| 20:00 | 8:00 PM |
| 21:00 | 9:00 PM |
| 22:00 | 10:00 PM |
| 23:00 | 11:00 PM |
Frequently asked questions
Is 12 AM midnight or noon?
12 AM is midnight, shown as 00:00 on a 24-hour clock. Noon is 12 PM and remains 12:00. The converter accepts the words noon and midnight as a quick way to check these cases.
Can I enter military time without a colon?
Yes. Compact valid values such as 0915 and 2130 are recognized. A leading zero helps make early-morning values unambiguous when you copy them from a roster.
Does this calculate hours worked?
This page converts one time of day. To find a duration, use the time duration calculator. To total several shifts entered in 24-hour format, use the military time card calculator.