A one-page chart to keep nearby
The main table has 24 rows, from 0000 to 2300. Each row shows the 24-hour number, the matching 12-hour time with AM or PM, and the spoken version, such as "oh six hundred" for 0600 or "twenty-one hundred" for 2100. Scan down the table once and the pattern is clear: from 1300 onward, subtract 12 to get the afternoon hour.
Under it is a minute chart. It shows how the last two digits are written for each minute count, so you can see that 1:05 PM is 1305 and 1:50 PM is 1350, and how those are said: "thirteen oh five" and "thirteen fifty". It answers the small question of where the leading zero goes.
Two buttons turn the chart into something you can use away from the screen. Download PNG saves an image for a phone wallpaper, a slide or a shared drive. Print or save as PDF opens your browser print dialog, where you can send it to a printer or choose Save as PDF as the destination.
If you only need one conversion, the military time converter does a single time in either direction. The chart is for when you want the whole day at a glance.
Worked examples
Questions about this calculator
How do I save the chart as a PDF?
Press the print button, then pick Save as PDF as the printer in the dialog that opens.
What does the PNG download contain?
It contains the chart as an image, ready to attach or place in a document.
Why does the table stop at 2300?
Each row stands for the start of an hour. The last hour of the day begins at 2300 and runs through 2359. The next row would be 0000 of the next day.
Is the spoken form the same in every country?
Not always. The chart shows a common style, "hundred" for round hours and "oh" for a leading zero, but local habits vary.